Someone said :
I certainly know that before I came out, I spent a lot of time trying to sneakily touch faces in man-hugs.
'Oh, I'm dreadfully sorry, straight friend! That was an accident. Wouldn't want anyone thinking we're fags.' But secretly it was all going in the Wank Bank.
I used not be much of a hugger, but now I hug my friends a lot. (I think it's partly to do with my general descent into being overly emotional all the time.)
However, I don't tend to hug acquaintances, or people I know professionally--it's always a handshake, which some people find stiff. That's just me though. I am a bit stiff.