I don't think many people do, I mean everyone knows a jen or a jennifer or knows someone who does, but jenna's are few, far between, and usually vaugely entertaining.... well at least if you believe 100% samples....
I used to want my name to be Jenny. In first grade, I would write Jenny on my papers instead of Micha..
I would draw a little animal head on all my papers instead of writing my name from first grade through third... I had a mild obsession with the middle ages and signets......
I think it was supposed to be a polar bear.... I was obsessed with them too..... did you know that if you were to eat a polar bear liver you would die of an overdose of vitamin a?
Technically, you could... Only for the american one, though.... ahaha..thats really interesting polar bears are cool
they can also hold their breath longer than any other land based mammal and have webbed paws...... a polar bear may spend as much as half of it's time during the summer months in the water......
Take it easy, you'll have plenty of time for teen pregnancy after you graduate. Or drop out to pursue your acting career. Whatever.