"I don't want to see anyone leaving single tonight. I want everyone to leave impregnated"

The quote by Joel Madden is likely suggested to be funny and not to be taken actually. It seems a statement made in the context of a social gathering or occasion, with Madden revealing a desire for everybody present to have a successful and pleasurable night. By mentioning that he does not want to see anybody leaving "single," he is indicating a desire for people to meet someone they are interested in and potentially form a connection. Using the word "fertilized" is intentionally intriguing and exaggerated, recommending a desire for individuals to make significant connections and have satisfying experiences, instead of just leaving alone or lonely.