it started about 20 years ago when our sex life was virtually non existent. Wife came in from work early and caught me wearing a pair of her knickers and a flowing nylon nightie. She went mad, called me a pervert and threatened to leave me. Anyhow I promised to do anything she wanted and swore I wouldn't wear them again. After a couple of months we had been out to the theatre and she was feeling up for it. I am not very big down there so she suggested I put on the knickers, anyhow I was still not very big but I was rock hard and we made love. A couple of months went by and she suggested I dress up in her lingerie, I did she played with me made me up and I had a great time. It became a regular thing and went on for a few months when she dropped the bombshell and said she wanted a real man, not a sissy. I was fully dressed up including make up etc. She said she was going out with her friends. She came home late that night and told me she had met someone else but he was married. She said he will be coming round the next Friday so I should make myself scarce. After a while she told me he knew all about me being a sissy and thought it funny. He suggested I should watch and learn how a real man does it. Well that 14 or so years ago I still watch them only now I am fully dressed in little girl type clothes and a chastity cage. I enjoy watching and sometimes participate. I get a real weird sense of enjoyment.
Whatever works for you is fine by me, as we all should be able to get some satisfaction from life and the size of your wife's boyfriend penis is of no real concern to you, however, it will please the wife!