My mother used to say something similar. She would see some of the sleazy girls around the way, shake her head and say "Even a chicken would get feed before the slaughter." I never understood that saying until I got older and realized that there are some women that place no intrinsic value on themselves. It's like my mother was saying that at the very least, if you're going to be a loose woman (ho), at least get something of value out of it.
I went to school with a girl that was just like that. She'd date a guy, sleep with him the first night, and it was always a revolving door of men--then she'd complain about how lonely she was.