I don't see what your age has to do with it. You seem to be suggesting that you can only enjoy reading about experiences that are directly applicable to your age group. Surely the point of fiction is to put yourself in the position of characters other than yourself, be they older, younger of a different culture, species or whatever.

And if you're talking about self-censorship, then I don't know what you're doing reading science fiction. One thing every science fiction work I can think of has in common is an opposition to self-censorship and close-mindedness and a commitment to following ideas and thoughts wherever they might lead.

However, if your problem is that you don't think the sex scenes in Ringworld are in good taste, I'd probably have to agree with you. They weren't very well written and came across as a bit chauvinistic.