Going to amend my previous comment, in light of something that happened a month ago.
I went on an OKCupid date with a girl who explicitly said she was interested in something casual.
When we met for drinks, she restated that she was "looking for someone to meet my sexual needs since my separation."
First time I've ever met a girl that direct. And, she was attractive!
She asked what I liked to do sexually, and I told her. She asked if I had an interest in anal sex, and I said no. She concurred, and I saw an opening.
I told her my theory about anal sex, which is that it's an exaggeration of regular sex that some find enticing, and that I believed it was a more common among American men, thanks to circumcision. She asked what I meant, and I said that with the loss of so many nerve endings, circumcised men may "miss" something in sex that they can't put their finger on. Anal, being a tighter, more abrasive orifice, might seem like it would provide the stimulation that their body is missing.
She said she'd never thought of that, then she asked if I was circumcised. I said no. She said she'd never experienced an uncircumcised cock.
After a little more conversation, she asked if we could go somewhere to make out, but no sex. I agreed. We went out to my car.
Fooling around in the back seat, it didn't take a second for me to get fully erect in my jeans. She squeezed the whole length of my penis, and at the end, paused kissing me to ask, "Is this your foreskin?"
I said yes. She continued probing and squeezing it, then asked if it was sensitive.
"In a good way, you bet," I replied.
In between my groping her breasts, kissing her neck, and fingering her very damp vulva, she returned to pinching my foreskin through my pants, gently. As promised, we didn't have sex. As she left, she said she had two more dates to get through that week, and she'd let me know.
She texted later that she had decided to go with a guy who lives closer to her. But she asked if she could keep my number in case it didn't work out. I said, "Okay."
If she follows up again, I'll let you guys know.