There may be issues that have yet to be addressed. One is, at least in my experience, that intercourse is more pleasant when not wearing a condom than it is when wearing one. I believe that this is true for most men.

Another is vaguer, but it is that the process of arousal and heightened intimacy which may begin with a wide range of interactions over an extended period, commonly climaxes with relatively brief sexual intercourse. By the time that the pair are about to “start” the “event” of sex, the sexual encounter has been underway for quite some time. I would suggest that within this context, the frame of reference the couple has at the moment can often see the requirement of condom use as an artificial imposition.

These are also reasons for the low uptake of prophylactic use.

__________________
Eudaimonia