existentialist
Tired and unemotional
I think there are often differences, but not always. The problem is working out when the differences are a problem.I had a similar experience. Still friends with her now (if only on fb) and I will also always be grateful to her... for the friendship and guidance as much as the sex.
I think it's different when it's a teenage boy and an older woman. I know some people find that offensive, but IMO you can't really argue the same power relationships exist between boy/woman and girl/man
One major issue is that, while the idea that every teenage boy would happily screw anyone prevails, those teenage boys who were manipulated into sex with a much older woman and suffered the emotional consequences will be marginalised and given to feel that the residual feelings they have are not valid, because they "ought" to be feeling cocky and proud, not used.
It sounds as if your experience was about a great deal more than simply being used for sex - even if it was technically as illegal as anything Bowie is being accused of - but it's worth pointing out, if it needs to be, that you may have been fortunate. And, given the attitudes of most teenage boys to matters sexual, it was probably more luck than judgement... I don't mean that as any comment on you, specifically, though.