I have a friend that says he is straight but he sure likes to talk about penises. I remember once how he said "you only need a 7 inch dong to be a star!". We also have a Pelonis brand air conditioner, and he put his hand over the L and the O so it said "penis". He then smiled. He has also mentioned, "receiving in the butt" before. And once he bent over and said "someone would give it to me good if i bent down to far!". I also once said a screw would not fit what we were trying to fix, and he said "I bet you don't hear that very often!" (He was again refering to penis size". And he said "do you think when old men go to the bathroom they can get it all out in one stream?" I have never heard other straight people be like this. Whats his deal. I
I'm gay and I joke about vaginas on occasion (My favorite catchphrase right now is ":***: HER RIGHT IN THE :***:!" from that one meme). I know that's kind of the complete opposite of what you're asking but there are lots of parallels. It's not unusual for a straight man to talk about penis. Although, as a guy in the closet, when straight guys do that it turns me on a little, but I have to remember that they're just straight and don't mean anything by it. Hope this helped you a little!
Straight guys do have a habit about talking about penises all the time. It makes me laugh. Of course, I'm surrounded by high school guys, and they're not exactly the definition of mature... However, I do know there are guys and girls who will make plenty of jokes regarding being gay if they are comfortable with their sexuality. Guys will flirt with their gay friends, and I know some of my straight girl buds can be very clingy with me.
So it sounds like the underlying question you're really trying to ask is... is the guy gay. And the answer is: Who knows? Nobody but him. Maybe he is, maybe he isn't. But if he is gay and closeted, there really isn't much of anything you can do unless/until he decides he's willing to confront his feelings and come out. And that could be anywhere from weeks to years to never.
Meh, some straight guys talk about penises plenty. Also, bacon and Batman. And a combination of all three?
If hes gay he's making it a bit, perhaps not obvious, but known. Then again we all do and say things that are little tells about our inner selves we'd rather not let people know, are an obsession with penises (a male obsession lets be honest whoever we're talking about) his?