My wife used to complain when I bottomed out, saying it was very painful. I had to be careful of my angle of attack,,to make sure I didn't hurt her. However, I had a younger lover a numbr of years ago, a very petite girl and one day, we were going at it, really hard and she screamed out in pain. I pulled out and apologised. She give me this really sexy look and said, "don't apologise, it was a nice pain", winked and guided me back in.