I've never done this, but I've often thought of my body having male and female parts, notably my cock/ tongue as 'male' and butt/ mouth as 'female' and my mind wanders during sex to change from one gender or another, sometimes on a whim.
Can what you describe here be done with a dildo for practice? Or do you need real cock to get yourself to come? I have done some butt plug and anal dildo trial runs with some dual-density silicone dildos, but didn't seem to get to the climax you describe ( I was playing with my cock at the time, so maybe I'll go without that and see if it works better.)
This looks like it'd be so hot when I'm the top, lying on my back, and the bottom would be facing away from me, as my eye gets turned on by asses, thighs, and flat abs of both genders. Boobs, not so much, but asses, yum!
OMG, I just thought of something else that's totally hot for me, namely black ass. My first roommate in college was a black body-builder and the white women lined up in droves to get tapped by him. My introduction to sex was when I'd wake up (often) in the middle of the night and there he was, white legs wrapped around his tiny black ass and the women moaning every time they came. And they came A LOT.
I didn't realize I was bi at the time or I would have gone across the aisle and pegged his gorgeous black ass with my thick white dick while his very gorgeous black cock was deep into white pussy.
interracial. Man, what a turn-on. I still get goosebumps thinking about my cock buried in tight black male ass.