My first girlfriend was a redhead. We would take off our clothes and roll around naked in the back of my Jeep parked in random places. I saw her once at a bar a few years ago and she put her mouth on my ear and licked my neck while pretending to whisper. It turned me on. I can tell she's been with a lot of guys since we first frolicked but I would do her again, and again, and again.
I would never date her though. IT would have to be purely sexual.