My wife will sometimes ave me set her up to get fucked anonymously. What she likes is to have me find a man to fuck er, maybe a guy she has a crush on or one she and I both know, has provided evidence of being STD free and we know we can trust. I set it up with the guy and he shows up at the appointed time. Meanwhile wife has been tied down on the bed spread eagle, naked and blindfolded and ears plugged, so she can not see or hear. Some times she is tied head down ass up. I escort the guy in and tell him to fuck my wife, he rails her and makes her (hopefully) several times and leaves. She has no idea who has fucked her but she trusts me to have done my job.