Gosh, I must be peculiar because I'd just laugh if I saw my husband looking at porn. Or just walk on by ignoring it. After all, with the computer they are only looking - harmless really. It is only the same as the stash of Playboy magazines in the bathroom in the pre internet age, isn't it? I have always assumed that my husband and sons look at the stuff, or have looked at it and it all seems sort of normal and inevitable.
I do remember years ago at work, when we upgraded from a mini-computer with terminals for each employee, to a network of individual PCs. A very devout catholic lady decided to use the internet to book a flight to see her daughter, on Virgin airlines. So she keyed in Virgin and got inundated with porn sites. She was mortified, we all thought it was hilarious, and the IT people could hardly keep a straight face when they responded to her panic.
But - it shows how easy it is to look at that stuff. Even when you don't want to!