Why do dogs lick humans?
One of 2 things usually.1) Their way of kissing2) If your skin is very sweaty they will lick and lick to get the salt !
It's their way of showing affection. Although sometimes it's just because you taste good.
It's their way of showing affection, or they think you taste good.
Cause we taste good;) maybe it's like the whole smelling us, thing too.. So they remember people the next time they see them by their sent or taste?
There are several reasons, but the most common is a sign of submission.
Out of habit, to relieve stress, to show affection, more reasons here: http://animal.discovery.com/tv-shows/its-me-or-the-dog/training-tips/dog-licking.htm
Because we're delicious. I am, at least.