I had the horrifying experience of duct tape on my breasts. I was tied up and blindfolded and my partner at the time thought it would be a good idea. A lost layer of skin later... yeaaah. Needless to say that never happened again.

I really truly would advise against using it. I've also been told by my father (though as a child, after sis and i thought it funny to tape over our mouths) that the adhesive side can actually make you very sick, especially if you were to say lick it. How true this is, I couldn't say, but it certainly has made me think twice about it.