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WORDS DON'T HAVE RELATIVE MEANINGS. This discussion is like describing something as both cold and hot. It can't be both things at the same time. Now, I don't know if a lot of men find sexual activity with other men desirable. I, for one, don't. But even if most men do that IN NO WAY changes the definiton of the words "straight", "gay", or "bi". They're abstract concepts that exists independent of someone's wants and desires.
Sorry to disabuse you but all meaning of all words are relative.
Usage defines words, not dictionaries...
That's why dictionaries get updated regularly.
The point is that there is almost no such thing as a "straight" man by your definition.
The other point is that a large percentage men who self-identify as "straight", nevertheless, have had sex with men. Be it once or weekly.
Ergo- your defintion of the word straight can not possibly be correct.
The term homosexual refers to sex with the same gender- heterosexual refers to sex with the other gender.
So of the two words- straight, or heterosexual, the one with the more definable meaning is heterosexual.
Straight, as a slang term, has a far more mutable meaning.
The fact is that men who only occasionally indulge in sex with me often self identify as straight. What do you think their reasoning is for this?
Partly, certainly, it is fear of the social bias against homosexuality.
But I argue that they feel a marked difference between their desire for women and their willingness to engage in sex with men.
I would argue that such men feel an emotional attraction and want to pair bond exclusively with women... but for various reasons are not adverse to sex with men with no emotional attachment.
I am suggesting a way of looking at the terminology that eliminates this kind of absolutist debate.
That Gay or Straight refer to your ROMANTIC inclinations and preference. The Gender that sends you.
The recognition that SEXUAL behavior is sometimes opportunistic and not entirely linked to ones preferences.
I can enjoy sucking a cock, but I would never fall in love with a man.
And given the choice between cock and pussy I would pick the pussy every time.
How is that not straight?
ETA- being more open minded than you doesn't make me less straight... not as long as women are the only ones with which I form deep emotional attachments.