There are a few but off the top of my head the scene in which he said he had seen someone squirt before but hadn’t done it himself. Seeing as he seems to have bottomed in all his relationships with men, and squirting is already extremely hard to do as a man, (let alone as the top) I’d say that indicates he may have been with a woman before.
I just explained to you that it’s already hard for men to do that so that MIGHT (keyword) POTENTIALLY indicate bisexuality. Also, it wasn’t stated, but we’ve only ever seen him bottom on relationships. Look, I get it you disagree that shin could be bisexual, die on that hill all you want. I just simply said there is no confirmation of that.

BRO I WANT JAKE TO SEE THEM AND GET JEALOUSSASSS PLSSSS and holy bisexual shin