Hard as it may sound, get up and walk away when they do it, or at very least frown and look away. Do not reward it by giving verbal attention, even negative verbal attention.
:-p is a sideways face sticking its tongue out at you.
You can probably find her sticking out her tongue in private.
Due to the saliva and temperature which is radiating from the tongue.
Plutckg
your epiglottis
Sticking your tongue out
Santa Cruz
Like sticking out your tongue and having someone jab an icepick through it.
Albert Einstein stuck histongue out because a reporter was trying to take his picture so he tried to ruin the photo by sticking his tongue out!=)
Could be teeth problems or thirst or nausea
the peace sign in this case represent a women's vagina. Sticking your tongue out means you are preforming oral sex on a female partner.
If you stick your tongue out, you poke it out of your mouth.