He showed me his abs in middle school and I still think about it

So in middle school there was this guy who was tall and actually pretty cute, sat next to me in class. We'd always be talking and messing around during breaks and free periods. One day we're just goofing off normal and we arm-wrestle, right? And I'm holding like two of his fingers and he STILL beat me (and I'm actually pretty strong btw..) so I'm like ohhh and touching his forearm telling him to flex and checking out his muscles. Then somehow we get on the topic of abs and I'm like there's NO WAY someone like you has actual abs. I said it in this dead serious tone just to mess with him. And he's like... wait. "How am I supposed to prove this lmaooo I can't just take my shirt off at school." So we're both just laughing about it. Then out of NOWHERE he goes "hand, arm" and I'm thinking he's asking me to hand him trash or something so I stick my arm out. But instead he grabs my wrist, pulls my hand under his school sweater/cardigan and just... makes me feel his abs by moving my hand up and down. And honestly? His abs were INSANE. Like genuinely. I still think about that sometimes lmao. There was something kind of... I dunno. Thrilling about it.