Well, at least you said you realized you were speaking in stereotypes. But I dislike stereotypes so much... You've probably been around this board enough to realize INFJ males don't really fit into the male stereotype very well. Unless that's just me.
I'll be honest and say I really don't "act like a boy" as society requests. But really, what does that mean? Why do we have these stereotypes to begin with? How do we know that people do not act just to fit these stereotypes so they are not alienated from society? It could just be a neverending cycle driven by people's desire to conform and feel accepted. Or perhaps it is just hormones as you may argue. But as an emotional person, I've always believed people control their bodies with their minds (to a certain extent, of course) and not vice versa. Sure, you might feel irritable if your body is feeling sick, but I do not understand how some people can have their entire mindset changed based on something physical like hormones. I believe feelings are something more than proteins floating around in your blood.
Although I'm just a crazy abstract INFJ. I'm heterosexual and not a late bloomer or anything, but I'll definately "wait until marriage." I'd rather make sure I'm in love with the person first...