My exs mom learned about my less than average size down there
So this particular girlfriend lived at home with her mom, younger brother, and one older sister. We were hanging out and happened to be doing the deed before dinner. Her mom was coming to let us know dinner was ready and did that thing where she knocked but then immediately opened the door. The bed was on the opposite wall basically straight ahead from the door. Me and my gf were doing it doggystyle and the knock gave me just enough time to pull out before the door was open. So her mom saw both of us fully nude, my dick on full display inches away from my gfs bare ass. Her mom just gave an embarrased smirk and said "sorry, dinners ready!" and then shut the door. My gf and I got cleaned up and dressed and went out to the kitchen a few minutes later. We happened to be having a dinner with ring sausage involved and when I presented my plate to her mom to be served, she put the sausage on my plate and said out loud "oh look, this one's bigger than you" and just gave me a wink. My gf heard that for sure and just looked embarrassed, but I think her brother and sister heard as well. They kept giving us looks while eating. I ended up dating that girl for about a year and a half and her mom would occasionally make comments similar to that the whole time we were together. I often think about where they are now and how that was likely the start of my SPH kink.