Scenes/Things in Supernatural that genuinely don't make sense to me if Dean was straight:
The confession booth scene.
Sam just rolling with the fact that Dean's siren is a guy while still thinking sirens infect people through sex.
Dean being flustered by several men: Gunner Lawless, Aaron, Doctor Sexy, etc.
All the parallels between Destiel and other couples. (A big one being "last night on Earth" bc how do you do that accidentally.)
Having all the gay jokes be on Dean instead of Sam.
Paralleling Sam meeting his childhood celebrity crush with Dean meeting Gunner Lawless.
The boner Dean got when Cas cleaned up.
Dean gulping after Cas does an impression from a Western movie.
Charlie, a lesbian, calling Castiel "dreamy."
The way Mary looks at Dean and Cas when they hug.
Dean wondering why everyone assumes he's gay, while Sam not caring.
The logic that Charlie can't flirt with guys because she's only attracted to women, but then having Dean flirt with the guy for her.
Dean seeming disappointed when learning that Aaron's flirting was fake.
The amount of time Dean and Cas spend staring at each other.
Dean canonically having an orgy with Crowley.
A woman saying that she knows when someone's pining for someone else to Dean, just for us to learn that Dean was never in love with Amara.
The set design and script choices that lead to a cross in the background while Dean said "I do." to Cas after he came back to life.
That time when Dean wanted to say something and Cas was like, "It's okay, I heard your prayer." But Dean still looked like he wanted to say something important.
Amara: [about Dean] "I can see inside your heart. Feel the love you feel. Except, it’s cloaked in shame.”
If you want to have a more expansive list, @destiel-is-real-idgaf added to this one quite nicely: link
So did @wellofdean : link
theartofmadeline
ellievsbear
prguitarman
gracieabrams
romaincrisis
snowghoul
