I'm so pleased to read the reactions to this question, though I must say that I'm surprised. There seems to be a leaning in Britain which thinks that the equality of the sexes means men don't need to open doors etc. for women any more; this saddens me, though I hope it is still in the minority. As others have said, it's down to manners and respect. I'll hold the door open behind me for anyone, not let it shut in their face. I'll open a door for a bloke if they're carrying something, or even if they're not, just to be nice and return the favour. What do manners cost? Nothing. Or maybe they do - maybe a lack of manners costs us unkindness, disrespect, lowering of standards, to the extent that it may descend into rudeness or worse. We all owe each other the respect of one human to another. I am still one of those who believe that men are the stronger sex (and that doesn't mean better!) and I like it that way! By the way, I don't have any sons but I'd teach them chivalry if I had - my grandson's a bit small yet (just 1!).