weird lessons about being not quite feminine enough

Yesterday, my coworker left his car with the dealership for repairs and rode into work. I asked how it went and he explained that the trip took 2 hours, as he needed to get a bus, transfer to a train, get on another bus which was faulty, cutting off every few hundred yards.
After listening for a moment, I offered to drive him to the dealership, saving him another 2 hours on the return ride. He thanked me, and said he'd definitely buy my lunch the next day to say thanks. I appreciated this, especially considering that I knew his parents were helping him with the repairs, occuring so soon after spending money to repair his car after having an accident on the snow.
As we walked out the door that evening, we passed two female coworkers in the hall. One smiled and said, "Oh, you got a ride to the train station?" I told them I was taking him to the dealership, though joked that he hadn't been really clear about where it was.
"Oh my goodness, I would never do that," she remarked. I agreed that I was really nice and that he was getting me lunch the next day.
"You need to bring in something else too," the other said, "because those burgers off the dollar menu are pretty small!" We exchanged a few more jokes, then we left.
Today, this act of mine was the topic of conversation for quite some time. Only, it turns out that my actions were the cause of some great concern. First, I got an instant message, saying that the two coworkers I mentioned earlier were going to a nice local restaurant for lunch, a place we often take customers. They wanted to know if I wanted to order something THERE, something the recipient of my kindness would pay for. I declined. A few minutes later, she was back at my desk.
"Are you sure? We're going now. Are you sure?" I repeated that I was fine.
"Laura, if he had asked me to do that, I would have made him take me to Red Lobster the next day, and that would be if I'd taken him to the train station." I noted that I didn't think she would have taken him to the dealership.
"Well you notice that he didn't ask me, did he?" I nodded, then told her I respected her for getting as much out of men as she could, and that I needed to take some lessons in being High Maintenance from her.
Thing is, she agreed. "Yes, but you'd just need to move into my house for a little while. Like when all those people go on Big Brother. You'd be easy to train though, because you don't have a husband who'd try to push you right back down. You'd learn quickly."
I think this was the first time that doing a favor for a friend made me feel like I'd let down the entire Female Gender. Am I really supposed to feel that sense of entitlement over what people owe me for my acts of kindness, and just because I have tah-tahs? I don't. So did I lose Girl Points because I let my coworker make the offer himself, to treat me to something he could afford, rather than require something elaborate because I require, in my female coworker's words, "roses and not thorns," in exchange for my favors? You tell me.

--Laura