After my sexually stale straight marriage ended a few years ago, I flung myself into getting as much sex as I could. I had always known that I was bisexual but had not had the time to explore the gay side of my sexuality. So I had very limited experience of sex with other men. Over the next few years, I became quite experienced in gay lovemaking. I found most of my sex partners through gay hook-up sites. I'd been trawling...