Ian Kerner, a sexuality counselor and New York Times best-selling author, blogs about sex weekly on The Chart. Read more from him on his website, GoodInBed.

In a new critically-acclaimed off-Broadway play, with a title too controversial for print, a gay man finds himself falling for a woman, which makes him — and his male partner — wonder whether he’s “really” gay after all.

Can a gay man who is sexually attracted to women still be gay? And what about straight men who get turned on by other men? Are men “sexually fluid”?

Female sexual fluidity — the capacity to move from romantic relationships with men to those with women, and vice versa — is well established, as I’ve previously discussed. Male sexual fluidity is less clear, yet it seems to be on the minds of many men and women. In fact, I’m often approached by women…