Well, what do you mean bisexual? Historically speaking, most men had no problems having sex with men. Culture has shifted so few men today have sex with other men.
Why do you say MOST men historically had no problems having sex with men?
I should rephrase that. In
some cultures, most men had no problems. See the book and references. From that we can see the issue is culture not some biological innateness since there isn't much genetic difference between difference cultures.
