I usually just say "don't touch my dog."
Seriously though I hate when people just try to hold or touch her without even asking, I understand it , but hate it none the less. I usually try to say something like..."she is little and scares easy so please don't" , but if I'm in a bit of a b*tchy mood I just say "Dont touch her"...yeah ,they love me then
You could always try ..... don't let her lick your hand she eats her own poo