I think it might be a better idea to see a professional than to try with some civvie. If it's your first time (and it's later in life) you probably will have a lot of nervousness issues. A professional will be able to deal with them while a civvie could react in any number of ways...most of them bad.
If this is what you want to do and how you want to do it...then go for it and try to relax and just enjoy. The truth is, contrary to what many of us post, there are few really good, studly, gigolo grade guys out there. Don't try to hold yourself up to the standards of the guys that post on here...remember, we're all full of shit. Just go and have an open mind and have fun!
Hey, I may resemble that comment LOL.
Choke go for it brother, Primo is right on the money with his post. Try one of the agencies and ask the booker, especially if it's a lady booker.