As an example, the dongle joke had nothing to do with sexism.
I am not trying to shame you but have you ever been around groups of women as they work or play? Off color jokes are typical of the species homo sapiens in 2014.
The real sexists are the people - including the distinguished Miss Richards who initially reported the joke - who presume that women are such delicate little flowers that they can't exist in an environment for adults, where people occasionally make jokes that are unsuitable for kindergarten kids.
(i.e. I quite agree with you!)