I let my dog lick my ingrown toe nails.
What does that do for you?
I heard it makes some medicine work better.
Who told you that? I don't care if it is true or not, it seems nasty to let a dog lick toenails.
My friend told me, I don't know if it's really true.
I think your friend played a trick on you to get you to do something so gross. Don't let your dog lick your toenails, that's gross and unsanitary.