When a woman swallows semen after a blowjob, she is, when you think about it, eating your babies. Semen containing millions of sperm, which can be thought of as potential offspring, yada yada, you get the idea!
Russel: Oh Josie! I'm...I'm gonna cum!
Josie: (Sexy-aggressive voice) Oh give it to me Russel. I wanna eat your babies!
Russel: Huh? O_O