I am a happily married man with an active sex life, but I often fantasize about sex with another man. I am a very masculine jock type of guy, but I want to perform oral on another man and maybe receive anal. My wife knows about this and it excites her as well. We have an open relationship, but I have been reluctant to act on this fantasy because I do not really know how to go about making it happen. It will happen someday.