Women can look at Chester directly

Chester does not mind women looking at him directly. In fact Chester likes it.  He just feels uncomfortable with men doing it sometimes.  Chester does not know what the real reason behind this is.  Is this mind control, classical conditioning or hypnosis?

Is it because Chester has just found out about different sexualities?  Is it because Chester has been typing homophobic abuse?  Or is this completely normal behaviour as Chester has observed in other sexualities?