Under 18 or under 21 (according to the law in your region): wait until you get older.
This is one of those things, I got tired of not participating in this, no more posting "anon" question to other tumblrs. Another thing is, these are not my images, unless when I say so, they are not my property, if it's yours, just ask and I'll remove it. If it's adult, legal and consensual, then there should be only the limits by the people involved. Dare to dream, dare to fantasize, dare to do if you feel like it. For fun and pleasure. No place for prejudice. Would love to answer questions. (BTW: male, born in '79)
What you can find here:
The beauty of the female body
Not even I know what else
And so it goes on...