Mu 2 months old son keep sucking his fingers even immediately after feeding, what could be the reason for it?

A. hello dear good morning if the baby is passing urine 7 to 8 times in a day then no need to get worried for the feeds the babies receiving enough it for the day you can just always keep a check over the child because at this point of time they just exploring things but once they get the taste of sucking fingers that can be a habit