Note to tabloids: you can stop with the Jennifer Aniston artificial insemination stories.

Jen was a guest star on The Tonight Show with Jay Leno last night where she talked about her new flick "The Switch" and why she would never use a sperm donor.

When asked by Jay on whether she would undergo artificial insemination she replied: “I’d wanna know the guy!”

She then attempted to explain how sperm banks work--but she wasn't very successful. "You go to a bank and you have a card ... I honestly don't know exactly," she joked.

If you missed last night’s episode, check out the always lovely Jennifer Aniston on The Tonight Show below...