If it's true he's not afraid he just doesn't like them then most likely there isn't anything you can do. If someone has a fear you can try to work on that if they want. If they have no interest then they really want want anything to do with them. If you have you snake out around him and he doesn't really care it's likely he never will. He could maybe try to show interest in them because he is dating you and it's something you enjoy so it would be nice for you. Sometimes the better half can pretend and eventually enjoy that interest. More times though if someone has no interest they can't even fake one. It also wouldn't be fair to try and make that person like it because that would make you feel better. Couple can't always like everything the same. Some stuff you will like that he doesn't and some stuff he will like that you don't.

Just keep bringing the snake out around him. If he shows interest build on that. If he doesn't don't try to force it or that will most likely make him want nothin to do with it even more.