Am I the only one

Shay

The other day During sex in the regular laying on your back , legs in the air position, this guy went really deep and it felt like someone punch me in the stomach , I know he probably hit my cervix, but I couldn’t take it and slowly had to readjust my body to get back to enjoying it, but when I’m in 🐶 style (fav pos) , he can go as deep as he want to , and it doesn’t hurt. Why is that ?