Absolutely. Believe me, if it were possible to hurt yourself with a zapper, I surely would have.
All the lame 'warnings' you all whine and fear monger with; I've zapped above my heart, zapped across my eyes, zapped for all night, although I'm not going to take a chance zapping in the bath tub. I doubt anything would happen but short circuiting the zapper and I don't want to have to buy another.