Well, I don't have any personal experience in this area since my only sibling is a younger brother and I am straight.

The closest I could come to relating would be my cousin. She is really hot. We were swimming one time and I caught her staring hard at my dick. For a while after that, I thought about what it would be like to fuck her brains out but that's pretty much it.

I have a friend who told me that his sister let him kiss and suck her tits once (they were in their mid to late teens at the time). He says nothing else ever happened...probably due to the guilt feelings both of them had afterwards.

rabbit