Danie wrote:...a man said "young man!! hold that door for those ladies!!!". I was upset as well as humiliated.
You ought to have informed him that if he really knew about manners... it is the height of ill manners to correct somebody else's manners. Besides you could have turned to him and said, 'Why aren't you holding the door for me and the other girls then?'
Don't feel humiliated because of such errors, Danie (that man sounded particularly ignorant). I've been mistaken for a girl by bus drivers before now due to my hair - it tends to get curly when it grows - this, even though I'm not a feminine looking person at all. Its the person making the error that is making the error, not you. The faux pas is theirs.