What a beautiful view. I would lick all up and down his ass crack with my tongue. I would deeply probe and dart my tongue in and out of his anal opening. Then I would insert my full erect penis so far in his ass, and cum in it.
Excuse me, but I do believe your perineum is showing. All joking aside, you really have a very sexy perineum. I would love to lick it with my tongue. You also have a very nice ass and penis. Whoever gets to have sex with you sure is lucky, regardless if it's a male or female.