I have been the bull in a half dozen or so relationships but also shared both wives. My first usually met guys at a swingers club we attended but my second actually preferred NOT to meet them until right before they got down to it. In one case we set it up so I met him first after he answered an ad with picture, met him about an hour from our house, checked his background with his approval, set up a date, she got ready and in bed he came over and the first time she ever saw him was when I brought him into the bedroom.His cock was in her mouth literally within two minutes. Maybe less. It was a good match and we met him several more times. I enjoyed choosing the guy because my preference was to see her stretched by big cocks, which she didn't mind at all. I also knew that her preference was for older guys, so I would factor that into the equation along with her preference for uncut dicks. We had eight bulls during our marriage and her two favorites were in their late 50s while she was between 33 and 40. That's how we did it, anyway. I've usually been a bull to couples I met through clubs or online.