your information is mainly incorrect - I would say wrong, but I don't want to come across as a know it all or offend on my first post/reply. A "TENS" unit may be used pretty much anywhere. I have a t-shirt made just for me with pads sewn into it for my shoulder area and lower back. Any over the counter TENS unit can be used where desired. I thought about this too, for those with imagination and a curious sexual appetite. The 'wet' fluid area of a woman would transfer the stim ALL over.. where the drier area on a man would carry the stim. I would be every careful about the setting of the stim, as shaky (or anticipating/anticipation) would and could cause sever pain.