@Ovdose You forgot to mention the other infinitely many options. If this was a serious work, the obviously best solution would have been to try and persuade her that she shouldn't feel guilty, without providing some bs reasoning, since he had no reason to believe (well, except for the fact that he's the MC in this manga) that she'll trust such bs. However, seeing as this is a gag manga, it's indeed the best option. His explanation was definitely amusingly ironic, and specifically his thoughts regarding her being a pervert.
@Kayriel Yup, I don't think you'll be able to unrustle those jimmies for a while.
@boag indeed, getting put in a world where everything is contrived in order to have him have sex with any woman he wants must be taking a heavy toll on his sanity.
@newniez What did you think the comment section is for if not for discussing exactly that? It's like going to a bakery, and then questioning why people are buying bread.