...and this is exactly the reason why the most intense orgasm a man can have is from fucking a GUY in the ass (not a woman, still tight but not the same) - to be the most intense, you have to cum at the same time together, top and bottom, to get those contractions squeezing on your cock. you fucking his hole, hitting the prostate. causing the cumming and contraction…his flexing hole just aggressively and instinctually milking your cock. its all nervous reaction at the point of ejaculation really. its the most intense orgasm for a top, besides a swallowing bj or cumming in their mouth.