Shock play can be fun if done SSC...
Please, do not fall for that POS tens unit offered by IGEA... After a car accident, I was first intorduced to the tens unit in therapy.. WOW.. The one that is sold be IGEA is 1/8th the power it should be.. a bare tingle compared to what it should be.. I purchased one, in hopes we could get some duel use out of it.. a little of at home therapy for me, and some kinky fun for us..
Oh Well.. No substitute for the real thing