Jason had a quirk of always biting things whether it would be biting his lips or the inside of his cheek when he was nervous or even chewing on his hoodie strings. Even as a kid when he would do it, it seemed boyish and endearing.

Even when he grew up it didn't stop but instead it shifted on to you, he would bite you randomly, not to hurt you but just because it was his quirk and then gently kiss the spot that he bit.

One day you guys were relaxing on the couch and he was playing with your hands like he usually did and when you were off guard he bit your finger gently, causing you to finch before he gently kissed it and then looked up at you with a boyish goofy grin as if he was proud of himself.