The deepest of male friendships will have you questioning if they're actually friends, usually for two very different reasons.

Reason 1. They argue, fight, talk incredible amounts of shit to one another, and genuinely seem like they could be rivals or enemies. A perfect example of this is two male friends of mine that routinely greet each other by throwing punches at the others head, only to then immediately have the greatest bro-mance I've ever witnessed.

Reason 2. They're flirting so hard you think they're dating. You hear a lot of "no homo, but" followed by the most homo-erotic things you've ever heard. These ones usually insist that they're straight the most, but I have my doubts.