The Falsetto - What Does It (Or Can It) Express?

What does the falsetto express? Initially, one might think that singing in such a high register would be expressive of 'femininity'. That is, to sing in such a high voice is to express one's feminine or more youthful nature. However, as we saw through the course of our interesting discussion in class the other day, there's nothing essentially 'feminine' about the falsetto. For instance, Maxwell features the falsetto in "This Woman's Work", but I don't find this song feminine at all. I think what Maxwell expresses in "This Woman's Work" is not femininity, but rather vulnerability. But vulnerability needn't be feminine; for instance, a man's most courageous moment can be exactly when he's expressing his vulnerability towards the person he loves. In this sense I find Maxwell's use of the falsetto expressive of both masculinity and vulnerability. So what is the nature of the relationship between the falsetto, femininity, and vulnerability? Is there some single fixed relationship, or are there several cross-cutting relationships? Maybe the falsetto is expressive of vulnerability, since in singing in that register one's voice is more likely to crack or break. Since falsetto is by definition a non-standard register in which to sing, to sing it is to take a risk and deviate from a norm, which may make one vulnerable. And maybe it's because falsetto is associated with vulnerability, that it's also associated with femininity. Or no? What do you think?