Craigslist used to be an unending source of Bisexually curious guys, single and married, looking for another man to explore with sexually. Being a man's first Bi experience is powerfully erotic.
As a married Bisexual, taking another married man's cock and cum into my body is the best. On rare occasions, their wives would participate. Craigslist never disappointed in that regard at the beginning. It became overpopulated with flakes towards the end.