I'm not too sure what I should/can do. The Boss (TB) has been looking at porn on his PC. I heard it one day, he of course blustered about "oh, what's that then".... he's very secretive on his machine (and iphone). He disappears for several hours then comes back in jubilant mood. It's the office joke (there's only 4 of us, one of those Saturday's only) that he's seeing a prostitute.
He and his wife seem to have a love/hate relationship. They are both, quite truthfully, very unpleasant people. They hate everyone and everything. Won't bore you with the details, but they have no friends, make a nuisance of themselves wherever they are.
My colleague was off October half-term week (he's only a youngster) and TB spent an Inordinately amount of time clicking and tapping away on his computer (he's not particularly pc savvy). When you ask if he's done something he should have, you get a blank look. If I query what is he doing flapping around on his pc, he gets all flustered.... ok I admit I do it deliberately.
We then had a call from our "head office" (we are a franchise). His machine and the spare one in the office (where he'd spent a lot of time tapping away) had been infected (he's too mean to pay for pucka virus/protection). It had sent thousands of emails around to most of the other franchise offices (100) in the country. He looked horrified when I told him he had to shut everything down since his machine had sent stuff to others and has hardly spent any time on the spare machine since.
Last week, other colleague off two days. TB spent all morning tapping away, clueless as to when I was speaking to him and huffy if he got interrupted/phone calls.
He left his machine logged on (unheard of and we never know passwords) when he popped out. I happened to be passing 
and saw what was on there - an online dodgy (adult) chatline forum.
As a woman, especially when I'm on my own with him, I feel very ill at east and, tbh, disgusted he's doing this at work. He's at is again as I'm typing this (yes, I'm also on a forum - but not of adult nature when I'm at work).
Am I over-reacting? It really does offend me. Everyone looks at porn - but NOT at work. In larger corporations where I've been PR manager, this was an instant dismissible offence. It's his business at the end of the day, he's the boss.
But how the hell do I broach the subject? Had a word with my other colleague and he agrees it's disgusting, but how can we deal with it?