One time, my high school boyfriend was in between my legs on my bed, and my dad chose that moment to come into my room without knocking, which he never did. So my boyfriend had to decide in that moment “Do I stay between her legs and make it super obvious what we were doing, or do I move and give her Dad a view of her crotch?” He kind of did both.
When he left, my dad was sitting in the living room chair in the dark. After he walked out the door, my dad quietly said, “We’ll talk tomorrow.”
We did not talk tomorrow. We talked about it years later when I was an adult, and he said, “Yea…I decided overnight that that wasn’t a conversation I wanted to have.” – u/TA818