Scott is bisexual but like, so deep in the closet that not even Jean can really hear it in his head.

He has his little crushes here and there but always pushes it off as admiration so that no one, not even himself, really notices them. But he does really appreciate and adore Bobby, something he tells himself that everybody does. How can you not feel affection for the little prankster?

Bobby, on the other hand, is realising that some of his "admiration" for Scott is a little bit more than that. He's realising that, while he thinks Warren is hot, Scott is so much more than that. He knows Jean and Scott get married and have kids, and for some reason, that tears him up inside. So he pulls tricks on Scott all the time.

Little things like hiding pens or pencils that Scott just had. Or when Scott makes a warm drink, Bobby will make it go cold and then shrug when Scott asks him if he knows how it got that way. He'll make it snow in Scott's room when Scott is sleeping, so he wakes up and steps in a pile of freezing cold.

He does these little things to get Scott to come talk to him, even if it's to scold or reprimand because at least Scott is paying attention to him and not Jean. Jean hears these thoughts, obviously, and she feels bad for Bobby.

But she doesn't tell Scott, even though sometimes, she gets hints of Scott's "admiration" when Bobby is brought up or when he's talking to Bobby.

One day though, Scott confronts Bobby about the pranks and practical jokes because he's getting really frustrated when he finds his underwear in a frozen block or every match to his socks frozen as well. And Bobby avoids answering the question until he just blurts out that he's gay and Scott's like… well what do I do now?

So they sit down and try to talk things out about it and they both come to the conclusion that right now isn't the time to pursue relationships with anyone but when they get back to their time, if they remember any of this, they'll give it a shot even though being out back in their time is a really tricky subject.