in italian, the word is used to describe a guy who cares so much for his significant other and would probably do anything in the world just to make them happy.
x: martino ha paccato la scuola solo per seguire niccolò fino a milano, è proprio un sottone
x: martinoskipped class just to follow niccolò in milan, he's such a sottone
In the italian slang, someone who will always forgive the person they have a crush on even if that person treats them badly. In general, the one who cares more about the relationship