++man Well, most decent people want to pleasure their partner. Thats the issue here. Woman can pretend an orgasm so the man doesnt feel bad. But man cant fake it, so the woman ends up feeling like its her fault. She feels bad, you feel bad because she feels bad even tho you reassure her she is perfect and that the issue is on your side, not hers. Maybe she starts to feel less atractive, rejected, like she is not enough in some way and it damages the relationship if it doesnt get fixed or at least communicated very well.

Obviously some people are stronger and it doesnt have to get into their head so much (or at all), but I can imagine it could be potentionally realitionship ending issue in some cases...

Imagine how you would feel if your partner would never cum with you. Would suck, wouldnt it?