Things I Don't Understand: Episode 3

1) "Poking" on Facebook

2)  What the point of mosquitos is....

3) Cats

4) Chain emails

5) HTML stuff- although, I'm trying.....

So grab a button and tell me the things that you don't understand! 

[a href="http://www.rambosrampages.blogspot.com/"><img border="0" src="http://i1112.photobucket.com/albums/k487/tooguccicute/TIDU.jpg"/></a>
*Here's hoping this works because I've never actually done the whole button thing before. And, referencing #5 above, this is really way over my head.