I'd rather know the lyrics to every song, so I could sing along with anything without worrying about getting the words wrong.
From my mate, who was a pink leopard at the time, to me, a pink fennec: "Let's rub pinks" or something to that effect... X3
I've never really followed those, though occasionally I'll catch one as someone else is watching it.
Oh, that's a tough one... I've heard a great number of hilarious names, but at the moment, the funniest one I can remember is perhaps a character I named in the game Wakfu, one of my helpers called Ludwig von Pokenstik. I'm sure there are funnier ones I've heard, even my own name is a bit of a play on words. I just can't recall the best of them at the moment.
This is a fantastic question, though I've got so many favorites that I really can't pick one... I think I'll narrow it down a bit and pick one out of my own posted pics on FA, though that's a hard choice, too...
Among them, though, is this:
http://www.furaffinity.net/view/18530289/ A gorgeous pic of my fennec Cinnamon in a snow globe. There are other pics, naughtier ones, but I don't wanna get in trouble for that... X3
Her name was Jade, and she had a tongue like a... Oh, wait, you said "thing..."
All the messages. All. The. Messages.
That's a good question... Testing is required... I might need a new bed after this... <¬.¬>
My very own resort and the staff to run it... What? You didn't say how big the things had to be... <¬.¬>
If you really think about it... I mean REALLY think about it... The toilet has really done wonders for society. But I don't know if it's had the GREATEST impact... That might be something like electricity, which is kind of a bland answer and not as silly as toilets.