Funny, as a male, I've always thought of "guys" as being big boys...still emotionally immature to some degree, not actually capable of maintaining a long term relationship, drifting from job to job with no real ambition towards an actual career, and ultimately kinda self-serving.
A "man" on the other hand I've always thought of as the embodiment of all things male. Strong, stable, ambitious, family oriented, self-confident, embracing both his masculine and feminine sides to be a whole person. There is still passion and fire for both family and career, and the surety that he will be there to support his loved ones, or to "save" them when it needs to be done.
Maybe I have a naive view on it, as a male striving to be the best "man" I can be. I've always focused on being the total best that I can be, passionate about loved ones and the work I do, strong when I need to be and weak when I have no choice but safe in it because I've surrounded myself with great people I can depend, understanding and communicative but decisive when its called for.
Hey, we can all dream about what we wanna be when we grow up!
I think the author, Calbert, just doesn't want to settle down herself. To everything there is a season. Her definition of "guy" sounds a lot like "young" to me.
The world is full of real men and women who manage to have feelings and hold down jobs. For many of them, the reason they hold down the job is that they have feelings about their families.
Going back to the essay, I think Calbert is mad at her father (for some good reasons). Guys are men who are different from him.
Another oddity - she talks about preferring guys because they're often between jobs and homes, but she's a tenured poet herself with an extremely steady job. Most academics have houses, families, etc. Academics are part of the bourgeoisie, although they may not want to admit it.
She seems to have a younger husband. Perhaps that is part of it all.



