A baby has a strong suckling reflex and hence will want to suckle anything that is possible. Additionally they want to learn about their world and hence explore with all their senses. Taste is also a sense and they will taste anything possible. Do not worry and do not keep pulling the hand out.

the baby is.very small..in this age they take finger in.mouth to express hunger, sleep, sucking reflex , to calm themselves. taking finger does not always mean the baby is hungry .

1 month 23days

how.old is ur baby

but how to make him not put hand in mouth