Is it true if you have a baby when your 14 or 16 you can say goodbye to partiesmovies and hNging out with friends but couldn't you invite friends over or watch a movie at your own place?

Yes. However, while your friends are there you will need to feed the baby, change the baby, put the baby to sleep, feed the baby, change the baby, put the baby to sleep, feed the baby, change the baby, put the baby to sleep... etc