How often do men have sex without climaxing? I'd guess hardly ever if ever at all.
I don't always orgasm when we have sex, and that doesn't bother me. Sometimes I just want to fuck for the sake of fucking. It feels good and thats the sensation I wanted, whether or not it has an orgasmic ending.
But sometimes, you really expect to finish big. You want to drift to sleep in a euphoric induced coma. These times are almost undoubtedly when your lover rolls over and starts snoring before you can whisper, "please".
This annoys me to no end.
Sex should not be over until it is agreed that both parties are mutually satisfied. "No honey, I don't need to come tonight, but thank you for offering." Or, "One quick little orgasm will tide me over, thank you so much."