Can a man have sex with another man and not think of himself as a homosexual?

Yes, according to Afghan men belonging to the Pashtun ethnic group:

An unclassified study from a military research unit in southern Afghanistan details how homosexual behavior is unusually common among men in the large ethnic group known as Pashtuns -- though they seem to be in complete denial about it.

The study, obtained by Fox News, found that Pashtun men commonly have sex with other men, admire other men physically, have sexual relationships with boys and shun women both socially and sexually -- yet they completely reject the label of "homosexual."

Apparently, according to the report, Pashtun men interpret the Islamic prohibition on homosexuality to mean they cannot "love" another man -- but that doesn't mean they can't use men for "sexual gratification."

The U.S. army medic also told members of the research unit that she and her colleagues had to explain to a local man how to get his wife pregnant.

The report said: "When it was explained to him what was necessary, he reacted with disgust and asked, 'How could one feel desire to be with a woman, who God has made unclean, when one could be with a man, who is clean? Surely this must be wrong.'"

The report also detailed a disturbing practice in which older "men of status" keep young boys on hand for sexual relationships. One of the country's favorite sayings, the report said, is "women are for children, boys are for pleasure."

Sounds to me like these guys are quite retrograde and confused, especially about the technical definition of homosexuality, which is “Sexual activity with another of the same sex.”

Here’s the link to the FoxNews.com article.