did it grow

so me and my ex were together since summer 17 and he’s always been a “big” person depending on how horny he was but the last time we had sex was last year and his dick was just normal as i know it lol but this year we started messing around again and i noticed his dick got fatter he’s also 22 and i asked him if he took anything 💀💀 but he said no that we both knew he always been big and im like yeah but it wasn’t that thick before and he said maybe since he’s not 18-20 anymore could that be true? lol i thought dick stopped growing when you were done with puberty im just curious on why it got thicker 😂