Is it normal to fantasize about incest?
I am an only child but get soooo turned on when thinking about having a close to age (younger/older) sister and then messing around with her.
Parent/child incest I find totally repulsive but would very much be open to the idea of 1st/2nd cousin incest if the situation presents itself.
Just the ability to say I love you on a number of different levels really gets my engines revving.