Responses
You've got a point, it would certainly make him more secure to be with someone who doesn't lust after things he can't provide. Still, most people realise that nobody is going to fit their ideal fantasy and manage to live happily ever after anyways.
Generally spoken, there isn't someone who doesn't like breasts since in the first place that's where you're supposed to get your first meal from ^^
It's comparable to what laserpointers do to cats :D
I hate to be a downer, but in the first story, Sensei really needs to find a completely gay partner who doesn't like breasts. Shiba says he loves him, but come on, we all know that when a man loves women's big breasts, they will always be lured. Run away sensei, and find a hot guy who prefers your sexy man chest.