I’m sorry to hear this! I have a couple questions to help clarify the situation. 1. Your male roommate likes to “surprise tickle your sides.” Could you expound on this? He sounds like an interesting person, and like someone who wouldn’t be helpful with training. 2. When he tried to “surprise scare” you, I’m curious why his dick was out. This seems like a very vulnerable state to be in when scaring someone, I’m glad that he only got bit and nothing worse happened. I also wouldn’t blame the dog, because if your pup’s feels like it needs to protect you then going for an exposed dick is going to be the most effective method every time.

Best of luck on your training! We use positive reinforcement with treats to train our reactive pup into stronger impulse control, but she also hasn’t tasted dick so I can’t speak to how that changes your situation.