I prefer married women over 40. They understand their needs and mine. Good sex involves giving just as much or more than just taking. A 20 something woman can be a nice way to spend a couple of hours, a 40 something woman is a great way to spend an evening. There is one exception, if you want a fuck your brains out no holds barred fucking find a woman 30 to 40 years old that is getting or has just gotten a divorce. They can definitely be candidates for "share with a friend".
Brings to mind a story an acquaintance told some time ago. It seems he met this divorcee that was very horny and demanded a thorough fucking. She said she didn't like the confines of a bed and preferred to fuck outdoors. Since they were in the country they went to a nearby corn field. As he was disrobing he hung his clothes on a couple of cornstalks. She said"I wouldn't recommend that, we may not be coming down this row again tonight" He was likely exaggerating but I always did find the story funny