I've never been caught. I never do it when anyone's in, or that I know they'll be away for a long time. But remember, most parents now with teen kids didn't get the internet for porn, nor are they used to the notion. The more recent generation of parents will know to give their kids privacy for the internet. I personally was about 13 when I used the internet for porn, so for my kids that'll be when I consciously tell them they're allowed more privacy, unless I find clues earlier or am asked for it.
I'll tell you the extent of porn. Sometimes you imagine forceful sex, perhaps the picture is someone tied up. I'd say slightly rapey, but I guess more animalistic than actual rape. It doesn't matter because characters you create out of bodies in porn have no feelings, I'd say they're like robot girlfriends or sexdolls. But IRL it is so much more intimate and loving. I don't know if such a culture is misunderstood by actual rapists who think they're in their animalistic fantasies, but it is amazing how the most loving and caring people can get turned on by such objectification.