When me and my (still) boyfriend were 17, we were fooling around at his house after school. I was going down on him and he was about to finish, but he had a 7 year old brother who walked in at that moment. He asked what we were doing, I made up a story about how his brother’s belly got flat every day and so I had to blow it up (top of my head story) and so he just said “Ok” and walked away. However, the next day when I came over, his parents wanted to know all about the condition where their son’s stomach got deflated every day.