I had a pretty sour experience the first time a girl touched my uncut dick; she went for a blowjob then saw I was uncut, was grossed out, gave me a handjob, and broke up with me. After that I was scared to mention it ahead of time, and just tried to be hard already and pull the foreskin back before any gal saw it. Doing that, it was usually a handful of times before she saw me soft. I thought about a disclaimer of sorts before first encounters, but never followed through with it.