They should probably just admit they aren't straight
If Brokeback Mountain taught us anything, it’s that two men that are otherwise straight can fall in love and want to be intimate with each other. They don’t really remain straight if they are aroused by men, but they might be bisexual, pansexual, homosexual, etc. So when “straight” men seek out other “straight” men to get their jollies, they can’t actually be straight anymore, right? That’s not what the men who indulge in this particular fetish are saying.
When two men really love each other, they get it on. But what happens when they just love each other as friends? They still get it on, but it’s called bud-love.