Dr. McCoy - Can You Tell Me About Those Horny Tribbles?

Dear Dr. McCoy - What's with all the fuzzy, purring lint balls clogging up the place lately?  What are these things, and why the hell do we keep getting more of them?  -- Signed, Clueless In Warp Drive Maintenance

Dear Clueless In Warp Drive Maintenance, Tribbles are born pregnant. Enuff said?  Well, there is more, but suffice to say that the more you feed them, the more they breed like Bolian Bunnies. Sounds kind of like those Gremlins too - don't you think?  I've always wondered about that myself....