My wife has a friend who keeps WANTING to talk about their husbands' dicks with each other, but the other ladies in my wife's friend circle always shut her down. My wife will come home from an outing with the ladies and be like, "Ugh, Betty kept asking about the dicks we screw. Again. We tell her to shut up but sometimes she won't."
My wife's brother's wife (in other words my sister in law who married into the family), though, DOES talk about all things sex with her best friends. Size, kinks, etc. Everything. I know this because she told me once when she was frustrated when her husband told her to stop talking about it. She said it's so much fun, though. I told her that she can tell me anytime. She was about to start but then her husband came into the room. Haha.