What do men do standing, women do sitting and a dog do with one leg up in the air?

Shake Hands.

I would say either peeing or shaking hands

pee maybe, too easy though, shake hands i don't know do women have to sit first and then shake hands? i give up too.

meditate? hehe... imagine a dog's lower foot up in the air and meditating. hehe.. kidding.

sam's answer above is pretty hilarious "saying hi" hahaha!!!

It's shake hands.

PEE...but female dogs don't hike their leg up they squat.

shake hands

shake hands

shake hands

saying hi