Who doesn't have the expectation that someone (but not a particular person) will want to have sex (or be intimate) with them? If you're dismissive about this and dismissive about the effects of constant rejection or feeling unwanted, then I suggest you might be in a privileged position...
people in this position rarely see their own faults in the situation. I'd say you havent experienced someone elses persistent blind sighted entitlement over your body?
constant rejection sucks but you should look at why youre being rejected rather than expressing some kind of human right to get laid because it's not a thing when you can easily put on some porn and have a wank.
if you feel thats dismissive then so be it, I dont care, I dont think someone should fuck you just because you're feeling a bit horny that day - this is why marital rape got made illegal in like 95 or something
the problem with it is that it only considers one parties feelings - the one getting sexual gratification.