If I'm reading it correctly she's saying the average woman will oftentimes willingly trade sex for money. I believe there's a word for that, but I don't recall at the moment.
1. The physical activities that a woman feels obligated to perform as repayment of girlfriend tax.
[ Origin: Nikki, apparently ]
1. “OMG…you will not believe how tired and sore I am this morning”
“Why? Did you stay up late again last night?”
“Yes, Tommy still thinks that I owe him BF tax to pay him back from the trip to New York last month”
“Really? I thought he did that to be spontaneous and romantic?”
“Please, you should know that he only spent the GF tax just to get some BF tax”
2. “I’ve had to go to the chiropractor 6 times in the last month because of the BF tax I’ve been putting out”
- see also