I have used them on a girl and I have also have had them used on me.
To be honest I couldnt really feel it.lol.
Its hard to feel the motions during oral.
Dental Damn is a soft texture and has a pleasent flavor.
If u use plastic wrap the texture might hurt ur tongue b/c of the rubbing and also will taste like plastic-weird. Also, its not that efficient.
Doctors told me if I was guna do that, then u need to get a condom and rip it and put the plastic wrap on top to help cover all the other areas.
Hope my advise helped.