Why do ladies fake pregnancy?

I know this is an out there topic for some but let's not get too crazy. Why do you think people fake pregnancies? These are reasons women gave from an article online :

'I pretended to be pregnant because I was ashamed of getting fat "

"I faked a pregnancy and a miscarriage so my boyfriend would propose to me"

"I faked a pregnancy in college just to see if my ex would care. He slipped $500 under my door for an abortion"

"I lied about being pregnant to make my boyfriend happy "

"I lied so many times because I really wanted a baby"