The act of a man cumming while being fucked with a strap-on by a woman whether is caged or free, but he cums while she pegs him. Also, he can cum hands-free from the pegging, he may be tugging on his dick or the woman can be jerking his cock - all fair game as long as he cums while being pegged. Last, MFF is fine if the man is being pegged by a woman while he is fucking another woman or being sucked by her, as long as he cums while being pegged.