Why men feel cold in the stomach when they see a woman

I saw a woman last weekend and I felt cold in my stomack what does ti mean.

It was probley just a sign of attraction.

same reason dogs bark at criminals...cause shes evil.haha just kidding you like her that feeling is known as butterflys your just nervous cause you dont know what to do.personally you should go talk to her and be urself.if she doesnt like you back for bein you then she really was evil.but if she does then that cold can turn to warm and move alittle south if ya know what I mean.good luck man go get her

p.s. be confident girls love that...if ya make her laugh your chances are good

Lol sounds like fear. Follow your gut man.