How old is too old??

Or "How young is too young?"  When Mrs. Ackerman presented me with this question I wasn't sure how to answer it.
 In my opinion  the cut off line for a a person to have a child should be 40 years old. Because, if you have a baby at that age, you will barely get to enjoy the teenage to adult years of their life. How fair is it to them when dad can't come play catch because his knees are giving out? Or mom can't play dress up? And for the other question you really don't want to have a child at such a young age... You want to run and be free because once you get pregnant it's hard to go out with your friends. I'd say the appropriate age to hace a child young would be at the most 20... Your hopefully out of school and you have a job. (depending on college)But if you choose not to then 18 or 19 could also work.. It all depends on your schooling and finances when you should have you baby. Now don't get me wrong teenage pregnancies are in fact frowned upon, but my niece of 16 is carrying so, I have no wrongs to say about the subject. Personally I can't wait for the baby to be born!! :D Feel free to leave any questions or comments. Thank You!!