Just make sure you're students are making the distinction between what is masculine and what it is to be a man, as these diverge. Masculinity is more often linked with big lumpy oafs, stubble and expensive car are optional. And I wouldn't consider anyone a man, if he can't cook or wash a couple of dishes, no matter how masculine. 
I also think when they say the should be strong, they mean having big muscles to flex to their mates or supposedly impress girls (and muscle size and strength are not a 1:1 correlation). And while some supplements (fish oil, etc...) are all right, others are not.
That dad, with the suitcase-carrying son, I think he's trying to teach his son manners. Holding the door open, offering the lady they're with a hand when getting off the bus/tram/car...