Seeing as I got divorced when I was 48, all my recent experience is with "Mature" women.
From a woman in her early 50's. She apologized before we even had sex for the first time, saying that she could not cum during sex unless she rubbed her clit at the same time. Being a PhD and a psychiatrist, she went on and on how it was perfectly normal and that many women are like that, and I shouldn't take it the wrong way, yadda, yadda, yadda... Lights were off when we undressed, and she just wanted to jump me. No foreplay. So I just went right ahead, her first response was, "Oh my fucking god!".. she started riding and forgot all about her "Clitoral Stimulation" and came like an eruption. Afterwards, she very coyly said, "I guess I was wrong. 52 years I've waited for something like that, and Honey, it was worth the wait"
From another former gf. She was European and was always amazed at the stuck up attitude us Yanks seem to have about sex. Riding like a cowgirl she would yell that she would pay a million dollars for a fuck like this. Never saw a dime though.
From another former gf. She was into a lot of foreplay. When I was done getting her to cum with my mouth, and she was down between my legs, She looked up at me with her pretty blue eyes and a smile on her face, she said "You know honey, it's not so much that you are long, it's that you are so thick" She was another who was not used to cumming without rubbing her clitt while she fucked.
And another former gf... "Where did you get that body from and wherever did you get THAT?"
And my current GF... she's tiny, but a wet dream for me, being a boob man and all. She's a latina princess, 4'11" 125lbs 36G-26-34. Yeah, that's right a slim and stacked ALL NATURAL G Cup. She's actually bled a little from our first few times, and that's not even going balls deep. But she says to me, with a huge grin on her face "Honey, I can't WAIT to get all of that in me and RIDE it! But don't worry baby, once I get used to your size...look OUT!"
Usually before I get physical with with a woman, when the talk turns to sex, I usually make a comment that: "All my former girlfriends/lovers usually laugh at me when we have sex. You'll probably laugh too." That usually leaves them puzzled for a bit. When we finally have sex, there inevitably comes a time when they either laugh or giggle about how much fun having sex with a "Big one" is. And I then point out to them: "See, I told you that you'd laugh"
All this and I'm only like 8X6. I don't think of myself as all that big, really.
Cheers,
RD