It's all about context isn't it? I joke around with my female colleagues and vice versa saying things that we probably shouldn't, however it stays within the group. I wouldn't say that sort of stuff to someone who wasn't 'in on it'.
The problem with this case for me is why has it taken so long for these 13 women to come forward, why only from one group of women and so few complaints when you consider how many women he met, if he thought telling dirty jokes was norma surely he told them to all the people on the show not just these 13 off the professionals version.