In the missionary position?
Firstly, it's by far the best position for a bottom to be in to kiss the man who's topping him.
Secondly, to have the back of your over-full prostate thrust against by the cock-head of your lover is the most powerful stimulator of deep pelvic erotic feeling a man who is being fucked by another man can possibly experience.
And deep pelvic erotic feeling is where it's at. Totally.
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My cock for you Steveh. Just imagine it up you.