How do I tell my doctor?

I had my first child 8 months ago and honestly sex isn’t the same. We started having sex again at 2 months postpartum and everything was fine ( a little painful because I had a perineal year) but soon the pain went away. Here’s the thing: sometimes I can’t feel anything, like no friction. Maybe I’m too turned on or maybe cause I had a baby vaginally and I just know my vagina isn’t the same as it was. My question is, how do I tell my doctor? How do I word it? My husband is an average size guy down there (ok maybe slight below average) could that be why? Do I mention THAT to my doctor? I don’t want to offend anyone or really talk about my husbands penis. I guess I need help in wording it 🤷🏼‍♀️