More than likley by the time you get that age, thats all you'll want to.
It's not only normal but fun. If you ever get these desires of your own call me. I am much older.
I'm 5O and I think anal sex is bad.
It greatly increases the likelyhood of infections of both vaginas and penises.
It's also bad for the anus, as one might expect.
As far as cuming on you or having sex in front of others, I think those things can be a real turn on.
When you get past the basic urge to just have sex, in other words, when you're no longer young, you'll find that you're not as excited by plain old sex.
You might want to attend a swing club in the company of your next boyfriend just to watch and see what it's like to have sex in front of others.
Don't knock it until you've tried it.
All I know is that my girlfriend is 54, and she is up for anything. It is amazing - I'm 34 and getting bored with being married, besides me she has only ever been with her husband. She looks great for her age, If I didn't know better I'd think she was 40, and an attractive 40 at that.
She says that she can't get comfortable being "slutty" with her husband, so when she is with me she goes wild. It really is a wonderful thing - she can't get pregnant, and she is up for any kinky thing she or I can dream up. I've had her in ways that you've probably only dreamed about.
When we are together, it is just about the sex. We are good friends, but we are not married. No pressure about waking up to each other every a.m., no mortgage, no kids (together), no leaky roof, just pleasure.
I know society frowns upon this, but I can't recommend it highly enough.