At work today, senior colleague was talking to me we don't really have a lot in common, he's a knob and an arse kisser completely incompetent but knows who to suck up to. Anyway he was complaining about his new boss and how he's too demanding/blunt etc etc (in other words he's seen through him). He then went on to say that his new boss is too short with female staff members and he's tried to tell him that allowances need to be made to women at least for a week every month and then before and after this week can be "tricky" (is actual words). I'm normally quite forthright but I was so shocked at what he said I just looked at him, I couldn't actually reply. He wasn't being sarcastic he meant every word. He's not any more senior to me and I'm angry at myself for not responding. Was IBU not to tell him to shut the fuck up and not be so patronising?