When I was 12 I was obsessed with Invader Zim, but for some reason I kept it hidden from my family. I don't exactly remember why, but I would talk about it online, draw secret fanart, and slink off on Sundays to watch it in private with the door to my room locked.
As time went on, I let my sister in on it. She suggested to my parents to get me something Zim related for my birthday. They snuck off to Hot Topic without me and bought a shirt. It had the logo on the front breast and on the back, an ENORMOUS picture of Zim looking intimidating as fuck on his pak legs. This would have been awesome, save for the equally large quote on the back of the shirt: "PREPARE YOUR BLADDER FOR EMINENT RELEASE!"
So, at the time, I was coping with something I had been coping with since the age of six: I had, and still have, a massive piss fetish. I was not exactly great at handling or understanding it at the time. Even pee gags in movies and cartoons would make me either exit the room as fast as possible or curl up into a hot ball of shame.
Long story short, I opened my present on my 13th birthday, and the combo of my secret interest and my still confusing fetish, on a shirt, to wear in public, made me almost faint. I never wore the shirt and ended up giving it to my sister. My mom still thinks I hated my present and still sometimes brings it up. I can never tell her the true story behind it.