how often do you give the binky ?

Ma

my son is 3 months old and I just introduced him to a binky. I wasn't going to give him one at all but he's been sucking on his hands and thumb NONSTOP and I thought that was kind of dirty and I figured when he's older it will be easier to take away since I can't take away his thumbs lol. but idk how often to give it to him I don't want him using it all day long. I'm a FTM if you couldn't tell lol