Actually I should clarify. That is a reference to an old joke. Three women are in the OB's office and all are pregnant. One tells the others that the position they conceived in determines the sex of the baby. For example she is having a boy because her husband was on top. The second woman says she must be having a girl because she was on top. The third breaks down in tears. The other two women console here and ask her what's wrong. Between sobs she says "i'm ... having..... puppies!"

LOL.