Who’s sorry now?

For me, the interesting thing about this comic is that I’ve had such varied responses to it. So far I’ve heard the following from readers:

1) The guy really was in the wrong and just needed time to realize it.

2) The woman is giving him the silent treatment to punish him. (This, of course, would never happen in real life.)

3) This cartoon is really a veiled reference to the fact that the guy was impotent.

Any other theories?

↓ Transcript
MAN: ...and so, you see, it can't possibly be my fault!

WOMAN: I just won't say anything! He's bound to feel guilty!