My husband is very interested in fisting me. I've warmed up to the idea after watching it in porn videos, but with some anxiety. We've tried it a few times, but with no success of complete penetration. He has large hands, and I can't seem to get past the pain, or worse, the fear of being "stretched-out forever". I have never had a vaginal birth (2 c-sections), and being in my early 40's I'm afraid of damaging the elasticity of my vaginal walls, since natural resiliency declines with age anyhow. I don't want to ruin wonderful sex in the future, since we still enjoy a great "fit". I know he would be pleased, as I'm sure I would be too, but not the trade off. Am I over-reacting, or is it a legitimate concern?