Teens... What's your reasoning for trying to conceive?

There was a lot of going back and forth on this other topic re: teens ttc and whether they should be Ttc or not. I'm obvs not going to say you should or should not be BUT for the ones who are TTC and/or are pregnant ... What was your reasoning behind your decision? What made you want to TTC? 
Just for everyone (including myself) to  know! 
Thank you!