I agree with you. I think especially with traditionally "female" displays of emotion, like crying.
It seems it's socially acceptable, or at the very least understandable for a female to range all expressions of emotion, be it loud laughing, crying, anger, etc. Yet for a male, these options seem to be limited.
Also, regardless of how PC our culture filter likes to tell us we are, most people hold a social stigma against a stay-at-home-dad. Opinions range from: "Oh, he must be a p*ssy" to "Hah, what a loser, she makes more money than him"
It sucks, in truth, for both genders. For one, it undermines female "jobs" so to speak, in that a man is considered inferior if he wears that believed inferior traditionally feminine role, and thus implying that feminine roles are not good enough for a man. And obviously it doesn't give the SAHD credit where it is due.
As far as expectations that I personally hold, I think that I do have a very sexist reaction to an unemployed male vs. an unemployed female. I think I am more likely to condemn him in my own mind as being a "loser" then I am for a woman. Granted, it depends on the circumstances, but I think you understand what I mean. And I know it's not right and try to be fair about it, but it is a sort of gut reaction.