Jeez there is some unnecessary unpleasantness on this thread! Could we just not please?
Up the thread a poster asked another this question:
if you spend your life with a backdrop of men being useless clumsy gormless fuckwitted lazy couch dwellers that cant do anything without breaking it, leaving women rolling their eyes in frustration with them, then you, as a boy, will internalise that is what men are like?
I would say, based purely on anecdata that yes, it can and probably does directly contribute. There is also the difference in how we advertise products to men and women (men, you're awesome and deserve this! Women, there is quite a lot wrong with you but don't worry we'll fix it if you buy this product!) that needs to be included when evaluating impact.
Off the top of my head I can think of six men who basically behave like teenage boys in the home and expect a woman to skivvy for them. They x-box/loaf about all day and do nothing in the home/child care. I would think the every day sexism that is portrayed in advertising is a contributing factor. Only two are still married.
So yes, these sexist stereotypes have an impact. Of course they are based on real social realities. That doesn't mean they are acceptable. Societal change has to start with a collective responsibility and there is nothing more collectively accessible that what we allow to be portrayed in the media. This is how we have moved mindsets on from the days of Love Thy Neighbour and The Benny Hill Show.
We need to keep pushing against stuff like this and that means that negative portrayals of either sex is inappropriate in TV advertising.