What does it mean when a woman points downward at your crotch while she talking to you?

[LinkxPeach]

I went to talk to my female friend. She points her index finger downward at my crotch, and told me that, “she’s got to go to the restroom”.

[Guy13]

Bring that thing along with me to the bathroom, Fool. I hope you safely walked her to the restroom as a Gentleman