bit drunk and should ignore this, but....
Labour power is the commodity, that becomes equalised and homogenised and ends up as part of the total aggregate social labour that is productively consumed by capital.
Taking a shit doesn't as it clearly doesn't produce something with an exchange value, housework and reproductive labour does, labour power.
Labour power as a commodity is definitionally labour that is exchanged for capital, once bought, capital makes use of it within the production process through the production of use values, not as an end in itself, but as a means to the production and realisation of surplus value. The commodity that is produced in that process belongs to the capitalist and is pregnant with surplus value.
Housewife's labour exhibits none of this things - the labour of housewife's does not enter this process. housework, along with eating, sleeping, having sex, breathing, looking after your teeth and, like it or not, taking a shit and all manner of other things play a part in the reproduction of labour, but they are not abstract labour, they do not end up 'embedded' in a commodity (containing a portion of surplus value) that belongs to the capitalist who can sell it and realise that surplus value - quite the reverse in fact, they end up, and only indirectly and to an extent accidentally, in a commodity (containing no surplus value in and off itself) that belongs instead to labour who, sells this to the capitalist.
Well Marx himself argues.........
.....So if it domestic labour was unproductive when done by housewives it remains so when done by specialist companies and logically if it is productive when done by private companies it was productive
See this is the danger of just picking up marx quotes from wikipedia that are generally taken out of context and without even being aware of the context it was written in. The quote from marx you gave was from the a chapter of volume 2 that focusses on the costs of circulation and touching on merchants capital.
The point being made here by Marx is the simple one that value is not produced within the sphere of circulation (i.e. it's not about the productive and unproductive types of labour in relation to the production of use values as commodities, it's a point on a different level in relation to the sphere of production being the only place where value is created) and that while it might seem on the surface that merchants capital through buying & selling produces a profit (and does indeed produce a profit for the individual) it is not productive of value at the societal level, it merely shifts things around, helps capital circulate and captures a share of value produced elsewhere as it does this.
So the point being made by Marx in that quote is that circulation as a function doesn't produce value - it doesn't produce value when done as a secondary activity of the industrial capitalist, and likewise if that industrial capitalist sub-contracts out that activity to a specialist it still doesn't produce value. The full quote with a bit more context (and from a different translation) is:-
chapter 6 - volume 2 said:
To the capitalist who has others working for him, buying and selling becomes a primary function. Since he appropriates the product of many on a large social scale, he must sell it on the same scale and then reconvert it from money into elements of production. Now as before neither the time of purchase nor of sale creates any value. The function of merchant’s capital gives rise to an illusion. But without going into this at length here this much is plain from the start: If by a division of labour a function, unproductive in itself although a necessary element of reproduction, is transformed from an incidental occupation of many into an exclusive occupation of a few, into their special business, the nature of this function itself is not changed. One merchant (here considered a mere agent attending to the change of form of commodities, a mere buyer and seller) may by his operations shorten the time of purchase and sale for many producers.
I don't think recognising the role domestic and reproductive labour in general play in value expansion means one has to throw the Marxist baby out with the bath water and certainly many Marxist's don't eg Cleaver and Harvey etc
all manners of things play a role in value expansion (and as such are conditioned and disciplined by capitalist imperatives) - the credit system, banking, circulation activities, domestic labour, eating, sleeping, shiting, breathing, media, advertising, education, dominant ideology, etc.. this can be recognised and accommodated within marx's framework, without trying to shoehorn them into a conceptual category of abstract labour which they do not belong to.
Oh come on there did arise standards of housework and expectations, the development of these norms may not have been imposed by key performance indicators or some other immediately quantified manner but they none the less existed and were often directly imposed by husbands as the foremen of the home.
it's not abstract labour
The labour of an author or actor involves disparate disconenected forms of concrete labour, it doesn't involve KPI's or such, but nonetheless they produce value through the work that their publisher then sells
indeed, they produce use values, generally under some system of wage-labour, which are embedded in a commodity (containing surplus value) that they do not own and is sold on the market by those who provided the means of production to ultimately produce the finished commodity - the total social labour of these activities can be looked upon as abstract labour, housewife's labour does not do these things, it's not abstract labour.
likewise domestic and reproductive labour is homogenised through the labour power it produces being bought and sold on the labour market.
no, it isn't - you've misunderstood that categories & concepts you're using here. your mixing up two different kinds of labour, the labour of the housewife is not homeogenised/equalised and turned into abstract labour at the social level through social exchange
if you genuinely believe what you wrote there - you have to see that by that same logic eating, sleeping and shiting is 'homogenised through the labour power it (helps to) produce being bought and sold on the labour market' - because these activities also contribute to the reproduction of labour - so if the argument is made that housewife's labour is abstract labour then you can't get round the fact that shiting, sleeping and breathing is also abstract labour - which is of course nonsense
Basically your argument would mean that those working in households in putting out set ups and who weren't in direct contact with the agent were not productive of surplus value either, because their direct relationship to their work was mediated through the direct social relation of the family.
were they producing use values, under some kind of wage-labour relation (doesn't matter if it's piece wages, via another member family), which ultimately creates a commodity containing surplus value which in turn is realised through exchange on the market - then if so my argument would do no such thing as you suggest
Now seriously, this has been done time and time again all the arguments are there on libcom, where there was pretty much total agreement among all kinds of people (who generally never agree) that you are trying to shoe horn a conception of value into marx's theory of value that doesn't fit. There's nothing wrong with ditching marx's value theory for your own one, but you can't do this riding two horses at once - it doesn't work. Now don't be offended if i don't return to this discussion, but i really don't have the time for it at the moment, wasting so much time at the moment as it is...