During one of my classes, a guest speaker came to visit. The teacher sat behind me, I bent down to pick up my lip gloss, the professor saw my string thong sticking out of my jeans, on accident. He got a huge boner, I could tell because when he stood in front of the class, I could see it showing. He looked so embarrassed and luckily no one else noticed. The same thing happened a few months ago when he decided to sit next to me and I didn't notice my underwear was showing. When class was over, he gave me a dirty look. Should I feel bad about this?