What puns? I don't understand

In Germany Dora teaches English

I don't understand, please help!

I am guilty of this

Mah best friend!

I'm Infinity Whip, the Ruler of Earth

But what if you read a lot but don't take selfies?

I don't understand the first one, please help

Dude isn't a word in German?

I don't understaand, haaalp

Satan was an angel and made by god, he doesn't have a birthday.... poor guy :/

Lady History on Tumblr!

the first one is way over my level alrady

I'm a lesbian so I can't use the biology excuse, and don't wanna use the other ones. Any ideas?