Reminds me of a scene in a show called Rescue Me, great show, about NYFD.
One firefighter telling story of his night out; picked up attractive girl at a nightclub, ended up making out in the car. He says, she starts going down him right there in the car; giving it a real seeing to. Great head. He says he starts to fondle her, reaches down between her legs and........feels a package. It was a guy. Everyone roaring with laughter, one guy asks, "so what did you do?" First FF says, "well, when he finished I told him I.....". The other FF says, "You let him finish!!!??". First FF says, "Well, he'd already started."
I'd hoped I could find a clip on youtube, just about everything else is there. Plenty of other Rescue Me clips there if you want an idea of what the show was like. Worth checking out if it's on streaming anywhere.