When a female body is producing so much estrogen she begins to cry at odd times of the day or during an activities she usually doesn't cry during.
Kendra: I never cry during a movie.
Nate: Ok. Well just in case, here is the tissue box.
Kendra: *Sobbing* I don't know why I am crying.
Nate : Stop being an estrogen ocean. This isn't even a crying part.