same reason a child sucks a pacifier they just kinda do it might be to go to sleep or comping method just depends
It makes them feel good
of course they do
We both suck our thumbs when we are babies
It is estimated that up to 80% of children below the age of 2 suck their thumbs at some point, with from 40-60% developing this behavior as a habit.
Babies practice swallowing and sucking in the womb in preparation for entering the world so they can breastfeed. Sometimes it can cause them to get the hiccups inside your belly as well! :)
That is how babies eat.
Babies in the womb suck their thumbs. If you see your first scan and when doctor shows you that baby is sucking their thumb. It's incredible and a miracle all rolled into one. Marcy
Many children use their mouths as their primary function to explore what is around them, this is why babies often suck their thumbs or try and put their feet in their mouths.
Pacifiers
Pacifiers
none really the only harm will be taking it away which isn't that bad its better to give a child a pacifier then let them suck there thumb because u cant take there thumbs away!
A lot of them do. Like Dukey in Jhonny Test
they are exploring and still learning how to use there mouth muscles to chew bigger things so they suck there thumb to start.