Yes, and a great way to say hello to someone, as an ice breaker. It can also be a bit of fun, but as with anthing below the belt, choose your fun...err victim wisely, and or choose to be polite only.
Let's face it, all silliness aside, it is just an item of clothing and a zipper is a doorway to a body part with a natural bodily function.
I would want to be told, as I have been going
commando for most of my life.