I would be willing to bet money that it was another fake experience to guilt those who only have to give up their full time jobs, their porn, their computer, Christmas, masturbating, oral sex, TV, and what not. If only this "sister" had known that the benefits that were presented were as fake as the whole experience, even a fingernail would have been too much of a sacrifice.
And it is intended to make people with children be thankful that they didn't have to give up anything (aside their freedom, holidays, having fun at school, college, the prospect of making money, playtime, and vacations that didn't involve field circus) in order to go into the cancer.