I saw your comment on ink demon apologist's post, and I agree! People aren't automatically straight just because their in a opposite sex relationship. I personally head cannon my Henry as pansexual, and Thomas as bisexual. What about you? What are your head cannon sexualities for them?
(This was sent to my main but I’m gonna reblog it over to my BatIM blog @whatyouwantedmetosee after posting. Check that blog if you want other BatIM content from me!!)
I haven’t fully worked out my headcanons for my Henry and Thomas’s sexualities just yet! There’s still a few things I’m working out for my Requirement AU stuff that might affect it. But here are my main thoughts so far, at least as far as that AU goes:
My Henry is likely bisexual, leaning towards preferring men. This, I don’t think, is contradictory with his canon relationship with Linda, though. Heavy lean just means that he tends to be more attracted to men than other genders, but that doesn’t mean he Likes Women Less, he just Likes Less Women.
Henry and Linda’s relationship I see as being really solid, and Henry cares about her a whole lot. I also consider him not really being polyamorous. He wouldn’t want to split his attention between people, and wouldn’t feel great about it. But he’d be open to Linda being that way, I think - he just wouldn’t be interested in doing it himself.
My Thomas, on the other hand, I lean a lot towards similar ideas as @inkdemonapologist‘s thoughts on Thomas, with him being demisexual. It’s a nice headcanon! Thomas as someone who doesn’t often open up to people, but opens up more with people he ends up close to, and valuing those close relationships, it’s real nice content.
(Also a fan of inkdemonapologist’s thoughts on Thomas and polyamory, with Thomas being open to it but not quite coming to the idea himself, and having to have it explained to him.
I think it’d make a lot of sense to him, he’d just have trouble like... initiating something like that? And it’d probably take him time to trust and get close enough to someone else to want that.
Like Henry, Thomas would be good with Allison wanting to date someone else as well as him, too. He’d probably be pretty on board for Allison filling other relationship needs through someone else - he trusts her enough to be romantically involved with her, so he’d also trust that she’s being honest with him about these things, and that she still wants and enjoys their personal relationship too.)
...and, as a side note, while these are my personal thoughts - I’m also a (surprisingly?) big fan of just plain old “they’re straight” headcanons too. It’s nice to not assume every m/f relationship is straight, but I also like to try and avoid using sexualities that include m/f (like bisexuality) as Straight Be Gone:tm: by just slapping them on every canon m/f pairing and calling it a day.
I’m never going to be against other people avoiding headcanoning/designing straight characters (heck yeah make all the queer hcs I love them) but IDK, I don’t want to accidentally trivialise bisexuality or other sexualities by making them just the “don’t worry this m/f ship is queer” card. ...Also I just think it’s neat to make like... actual healthy straight relationships with proper communication and boundaries. A refreshing change from how that often shows up in media.