I've illustrated this concern before by talking about same-sex marriage. Although every locality that has begun to legally recognize same-sex marriage has experienced the same gender pattern - many more women marry than men - the focus and the pictures in news stories are much more often m/m couples.
Another example from this morning's NY Times is here. It's an article on the Massachusetts experience entitled, "Gay Couples Find Marriage is a Mixed Bag." The article clearly states that 2/3 of the legal same-sex marriages in Massachusetts are women. And the photos? A male couple, then a female couple, then a man (with a caption about him and his husband), then a male couple. Hmmm. Real marriages - 2/3 women. Pictured marriages - 3/4 men.