A Style Network special called 'Sperm Donor' that follows the life of 'Ben,' an unassuming guy who's been a sperm donor for years, premiered Wednesday night.

He's recently been contacted by 15-20 of his biological children, and in this clip reveals to his fiance that his sperm may be responsible for fathering as many as 70 offspring.

To her credit, Ben's fiance manages to contain her reaction, but the shock, and possibly horror, in her face is evident.

Ben's fiance tells him she sees his actions as selfish, and the gravity of his decision seems to hit him in a way it hadn't before. "I guess I was dumb. Maybe I'm being dumb now, I don't know," he says.