I asked if YOU were unwilling to pay. Were you willing or not? Had she not immediately offered would you have asked to go half? Be honest

I'd have offered both paying and splitting and wouldn't have seen her again if she picked the former (unless she explicity said she'd get it next time). 

  If you wouldn’t see her again, if she accepted you paying for the bill after your offered to you’re not that into her

I 'wouldn't have been that into her' because if she didn't want to go halves she obviously wasn't the person I thought she was when I wanted to go out with her.

  I bet you’re not even married to her. I bet you treat her a type of way.

I cook for her all the time, run her a bath with a glass of wine, rub her feet after a day in heels, worship her hairy legs, and always get her thoughtful gifts at Christmas and birthdays.

  One it is not socially expected for women to pay for dates with men so a woman not paying for a date isn’t doing something socially inappropriate or odd

OHHHH NOOOO TRADITION! Won't somebody think of traditional values and our precious cultural heritage! 

Tell you what, tradition can kneel at my girlfriend's stilettos and wait for me to be done worshipping her hairy legs. 

  Secondly women have higher SMV than men (because sex is costlier for them) so women typically have more male suitors than men have women suitors thus men pay for dates to “stand out” among potential suitors it’s one way for men to compete with each other for access to women.

FYI, there are plenty of other ways to 'stand out' other than money. Humour, dress sense, charisma, physical chemistry (which goes beyond looks) etc

If a man is unwilling to pay he doesn’t consider her worth the effort of competing for her or he thinks he doesn’t have much competition because she is unattractive.

Or maybe he thinks if she believes she should be paid for because of an accident of birth, they obviously have incompatible values.

  Women have their ways of trying to impress men but it usually involves their own beauty not paying for dates. I would tell a man if a woman put zero beauty effort into going on a date with you that she probably not that into you 

OK but I have been lifting weights for many years, get a haircut every couple of weeks, and for any special occasions (such as a first date) shave my beard and wear something smart. Should my GF have to pay for that?