Dead baby jokes

I don't get what people find funny these days. 


Dead baby jokes are all the rage, they have a couple of websites set up for just that. 
Is that considered cool, funny, new? Or am i just not prone to laughter anymore?
I'm sure they won't find it funny once they lose one of their own. 


A sample of what people find amusing: 

What's funnier than a dead baby?  A dead baby in a clown costume!

What's funnier than a dead baby? A dead baby sitting next to a kid with down syndrome.

How do you know when a baby is a dead baby?  The dog plays with it more.

What's more fun than feeling up a dead baby? Feeling up a dead baby with three nipples

How do you make a dead baby float?  Take your foot off of it's head.

What's the difference between a dead baby and a trampoline?  When you jump on a trampoline, you take your boots off.