Thumb sucker/super drooler

[KingstonMom]

Is the drooling related to the teething? Like, does he have his 2year molars yet? My 2 yr old son does not and he goes on and off with the drooling that also comes with bum rashes when he is teething. He was always the biggest drooler of all my daycare kids in the past. I have 2 others all withing 2 weeks of each other, and mine was always the biggest drooler, like needed at least 3 shirts a day or more. he didnt do the bibs.
Im not sure if it would be related to the thumb sucking or not. and ive never heard of the straw theory, but it makes sense.
my older son was a soother man, and we just took that away from him cold turkey, but my younger daughter is a thumb sucker, im not sure how and when i will get her off that.
I have a 2 yr old and 4 yr old daycare girls who both suck their thumb. I generally dont mention anything to them, leave that to the parents to instruct me if they want the to stop.
wish i could be more help!