Edenz,
Good news, you can go to Akane Massage located next to National Stadium Sky Train Station. I don't think they provide full sex but their special services is excellent, consisting of BJs and Handjobs! If you want your asshole/rectum to be invaded by a slim lubricated phuying's finger or fingers, they will oblige! Do a website search,
www.gdiary.com and scroll down and hit Akane Massage and go youngman and have fun.
And you brought your girlfriend to Bangkok, what is his name?