I was reading your article on loose and tight vaginas. Since I turned 30, I’ve noticed that I feel tighter—and not just during sex but also when I insert a tampon or my NuvaRing (for birth control). I see my OBGYN regularly and recently. I tried to ask about this but we were discussing other things and he forgot to answer this question and I forgot to re-ask. What can this be caused by? Why am I feeling tighter?