Is it homophobic for two straight men to talk/joke about being attracted to each other?

Is it homophobic for two straight men to talk/joke about being attracted to each other - especially if a gay man overhears the conversation - but it wasn't said just because they were in earshot. How far can the two straight guys go with a joke? - i.e. can they joke about having sex with each other or for example say that they look like they are jerking off their boyfriend when trying to remove something from a wall? Is this homophobic, being insensitive or is the gay person being too sensitive? I posted this to the gay subreddit because I would really like to know how problematic this is as I have gay friends who have never raised anything like this about the way I talk ocassionally.