Definitely, even when there are no mental gymnastics and the men have admitted to themselves that they are into men, there is the excessive "joking", the dichotomy of hot and cold emotions, the "confusion", and the "curiosity", etc. There are other tactics to circumnavigate the admittance to others of being bisexual, so that the straight privilege is maintained.Know a couple with clear tendencies that will never even think of it, also the mental gymnastics.
Of course, we are ignoring the men who may live gay lifestyles who are degrees of bisexual as well. Those men, for differing reasons, simply state that they are gay because it is easier for them.