Cats! The only critters capable of saying "Iloveyoufeedme" without taking a breath. What is especially wonderful is their ability to sense if you don't feel good or are worried about something. There's something special about having a "nurse cat" planted in you lap purring non-stop when you don't feel good - physically or mentally.
[Of course, if the purring doesn't work, they promptly distract you from your troubles by yorking on the carpet!
Highly effective too!]