He's not jealous, exactly. Jean doesn't know what he is, when it comes to Marco, except that the only time he can actually sleep through the night and not wake up in a cold sweat is when Marco is wrapped around him, holding him tight to his chest. It's pretty gay, but it's just to sleep, right? That's all it is.

The boners he wakes up with are entirely coincidental.

"Can I get the same treatment?" Jean knows he's good at crowd control with his rapier, but only in a limited capacity. Sometimes, you just need a gun to take down a horde, and he doesn't have a clue how to do that. And it's pretty obvious that Reiner knows the most about guns around here, shitty reading taste aside.