Ok, strange one last night. Went to dinner with some fairly new friends. The male is generally alpha (big body builder type) and his wife to be is also fairly strong willed. The funny thing was that the male kept trying to touch me, including my groin all night (he has never done anything like that previously); to the point where I was getting uncomfortable - I mean he was really trying to grab my assets. His wife to be was all cuddly and pushing her breasts against me and leaning on me (also felt uncomfortable considering my wife was next to me and her fiancé was in front of me trying to grab my balls!) I was waring A314, 4d, IH, 4s and a few drops of some average mix called Arouse-RX.
In all likelihood the guy is BI. Dont let his relationship status, build and alpha vibe confuse you into thinking he cant be BI. Its not that your giving off a gay signal either. Gay and BI people are attracted to the same pheromones men wear to attract women. Since this guy is a alpha he has no problem displaying direct cues to see if your interested. Just make it clear that your not interested using body language and if that does not convey the message then tell him to let go of your balls.