I don't personally buy it. When I met my first serious girlfriend, She was 18, i was 23. Over three or four years We played alot with larger toys, she loved having, one , two, three four, five fingers inserted then eventually the fist. We had a john Holmes replica 12inch dildo we played with. I'm Nearly 7inches with decent girth, which is a bit above average, I noticed it changed whilst we were playing, but a few hours later it always seemed to go back to normal. I don't think penetration even from Shane diesel would change her physically down there for any longer than a few hours.