It seems that Dan Savage, author of books and a column Savage Love also believes in the concept of straight men having sex with men. In his current blog, (June 19, 2007), he responds to a man who is questioning his virginity and responds to Boy in Florida by stating this:
When a male escort is engaged for oral sex, it is almost always the escort who is "serviced," not the client, because many gay men—and many, many straight-identified men—actually enjoy giving head. Please make a note of it.
Perhaps both Savage and myself know about Straight Guise because we are both gay men. Gay men have known for years that there are straight men who exist who enjoy homosexual sexual acts.