無理やり英語環境コミュのgo dutch?

hi,everyone

this time id like to know how you pay for expenditure when you go out with someone opposite sex.(your lover or just a friend)

im female, and ive never thought about this money issue seriously, but there are 3 different opinions around me, so id like to know what you think.

case 1) my female friend A
She pays for what she uses when going out with whoever(friend/boyfriend).

case 2) my female friend B
she pays for what she uses, just like my friend A,when going out with her friends.
but when going out with her boyfriend, she said "percentage of our salary, thats the best way of equality" that means, for example, if you earn \10,000 and your partner earn \5,000, when two of you spent \1,000 on your date, you pay \670 and your partner pay \330.
(just for example;not to mention about the amount (^-^;)

case 3) my friends friend C(female)
she pays for what she uses, just like my friend A&B, when going out with her friends.
but when going out with her boyfriend, she said her boyfriend must pay all of expenditure for their date. and she never share her time with any man who are not willing to spend money on her.

--------

well... you know, it just depends on the situation or what kind of relationship you and your companion have, but im a bit curious what other people think about this. for me(my opinion& experience), although it sounds a bit strict, my friend Bs idea is better.