I always bring them because regular condoms just don't work for me at all. Another provider actually introduced me to them in 2016. The trick to making them work is to use a lot of lube inside them. The girl either has to insert them herself or allow you to do it; or you have to pull off the smaller internal ring and insert them it by putting it onto yourself first, like a humongous regular condom. Weirdly, (because inserting it is almost impossible without some FIV outside the condom), I've had a couple of girls whose reviews and/or profiles say that they NEVER allow FIV let me do it. Once or twice, girls have also refused to use them, but that was either because they'd never seen one and didn't trust it or it was just a function of my being on the wrong side of the YMMV thing, generally. On the other hand, one time about two years ago, a girl refused because she didn't believe me that the ones I had were latex-free (she's allergic) and I was just going to enjoy her BBBJ and the P2P thing that she went back to doing, and the next thing I knew, she was fucking my brains out in every position and whispering in my ear not to CIP! Naturally, I went to my PCP for the whole comprehensive STD testing a couple of days later. To be perfectly honest, it was more than worth it. (Please don't PM asking who it was; I gave her my word I'd keep it between us.)