Oh my god. Guys are not like girls when it comes to messing around with the same sex. It just can't be done, it's physically impossible to be sexual with another guy if you are straight. There's this force... you just CAN'T. Girls on the other hand can mess around and say, "well i was young and a little drunk...", or whatever. There is nothing wrong with being homosexual but a straight guy kissing or caressing another guy and then saying he was young? No way.
Probie resting his head on another guy's shoulder... well, not enough to say he's gay for sure, we don't know who this new character is and what their relationship is all about. There's nothing wrong with two guys being close even though they made it a little overly sensual. But if there's kissing in episodes to come he's definitely gay. Although he could be a little screwed up by recent experiences.
But whatever, it's not like anyone is as stupid as the characters Garrity and Probie in real life anyway.
Ok just adding a personal opinion.
I believe homosexuality is something that you can't choose to be. It's how some people are born. A difference in genetic code. Just like any other thing; hair color, how much hair you have on your body, height, skin pigment, whatever. In this day and age homosexuality is not accepted like having red hair or something but eventually it will be. Because human beings ARE good at heart and evolve. Now some people might have had some traumatic experiences and choose to be with the same sex but come on plenty of people dye their hair or change something else about them and you don't place blame on the others who were born that way. We're all equal individuals, we've all got a soul and we're all just living our lives the best we can. It's ridiculous how everyone seems to say yeah, we're all equal but we can't seem to go all the way with that idea and just accept everything and everyone. Sh*t will it really take the discovery of life on another planet or some other type of intelligent species for people to on Earth to accept eachother fully. I mean, not even mentioning the fact that if we're so intelligent and this new species wishes us no harm we should accept them equally as well but nooo their different oh my god, let's take a thousand steps back and just be afraid of what we don't understand. Anyways, i'm a totally straight guy and would never ever do anything sexual with another male but if you're gay that's completely fine please don't do something stupid and consider hurting yourself. You're not inferior in any way you're probably superior because of the fact you're experiencing such hardships and can understand what it's like and are probably more willing to accept others for how they are. You're much superior than all the dumb people bashing on you for no reason. Good luck with life and enjoy today.