Like just based on some of the things Henry has done or said to her compared to how Josiah has never once laid a finger on her or written her off from the get go. Like ofc Henry is generally respectful, he's a good boy, he doesn't look down on her at all or anything, is her best friend and cares for her the most out of everyone there, without a doubt, BUT,
He did kiss her without her consent, initially told her to deal with IV alone because it's not his job (the first time they ever met), questioned her facial hair in a sort of demeaning way (again like one of their first ever convos though), and scolds her a little more overbearingly when it comes to him being worried about her over things like her drinking- not things I'm saying I blame him for / I wasn't putting him down or putting Josiah above him either, he's known to be generally pretty rude or dismissive until he bonds to you (and those few things aside, he did almost immediately lighten up and try to get to know her cos he could register she didn't want to be here and was in an unfair situation / didn't deserve the sas).
Her and IV being in camp was just really bizarre to him and something he didn't want to deal with on top of everything else he already had his hands and mind full of, but simply in comparison, because things like those DID happen, I think Josiah is more respectful lol. Without that meaning that he'd be the better option at the same time.

I think Henry and Josiah make a funny foil to each other when you think about it. Henry is her best friend and they care about each other so much and are the ship bait; you'd probably expect him to be the one Jenny would fw NTR style if anyone there, and he really does want to sleep with her / has a huge thing for her...

Meanwhile Jenny doesn't really care for Josiah / lacks any genuine attraction and he's just doing what she wants but doesn't have that sort of attraction to her either. They're not close at all. Them fucking would be shocking to anyone in camp who knows them; but her not being emotionally close to Josiah while trusting that he'll do what she wants without fighting or ratting on her is why she chooses to use him, there's nothing there, it's just easy and safe to take things out on.
Henry finds out about this and is a little distraught lowkey. He initially thinks she likes him and is just like "Huh?? what?? you like never talk... I out of everyone here would of known if she liked you.. like what????"

Henry a little betrayed bc he thought she tells him everything and this is so out of left field for him. He's assigned Josiah as a bodyguard / escort while he goes to refill his medical supply out of camp and he's just glaring the whole time like "Why you.."