Back in high school, I jokingly asked a friend's older sister, in front of her boyfriend, for a bj. He got mad an put me in a headlock for even trying, she joked back and she would, but only if I blew her boyfriend first. I've had a crush on her for years, and had been drinking, so I got on my knees to call her bluff. He told me to be careful what I wish for and unzipped. It was really awkward at first but after a few licks, I got really turned on by it, got super hard, and came from it (still a virgin at the time). She made me finish him off, then blew she me after. He got hard again watching us, so I blew him again, but got super into it this time. I've traded a few bjs over the years, but nothing more than that.