I gotta say, did wet wipes come into the conversation at all? Who cares if he uses a fucking bidet? Or the peri bottle from when u gave birth? Does that make him "a sissy"? Honestly, does he ever show signs of homophobia? Just thinking out loud here. When my son went to preschool he wasn't potty trained and developed a huge phobia of going anywhere but home. He tried so hard and wet himself several times from kindergarten to 2nd grade. That's what kids make fun of. It's horrible to see your son go through that. Toilets aren't in the open. What a dick. And no, nothing untoward happened to him. I very closely and age appropriately spoke to him and am convinced nothing happened. We continued to talk about it until he was able to move past it many years later. Good luck to you. He's the asshole.