Out of all the people in the cafe, I probably hate this guy the most. The other customers usually know and acknowledge their fetishes and try not to bother people, or even impose much on them (well, for the most part anyway. There was the Pregnancy and Cuck guy...).
However, because 'normalcy' is a sort of idealised word for this man, he can't accept anything else. He's a perfectionist in a way. 'Abnormal' is just anything he doesn't like and that is out of the 'ordinary', whatever that may mean.