P83 turns my GF in to a wild sexual beast! I only use it in low doses now, I made the mistake of 3 x 7.5 the first time wearing around her 
whoh…
Now I use only 1 x 7.5 and don’t tell her I’m wearing the P83, because in her words it takes away her “free will”.
MX151 and MX149 also do a number on her, but she still feels in control w/ these two.
Last night I had a similar P83 experience w/ MX143, though not so much of the scratching, grunting and growling if you know what I mean. 