Rosie & Nina
 

Rosie, posing thoughtfully in the mirror, says to Nina, "I think I'm going to see a dietitian."
Nina asked, "Why?"
Rosie answered, "'Cause I need to know once and for all how many calories there are in sperm."
Nina replied, "I really have no clue, but if you're swallowing that much of it, no guy is going to care if you're a little chunky."