Do you feel watching obscene particles in websites isa signof dropping morality?

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I remember few months ago an awkward experience of me and want to share it you. I have a friend who is a bit workaholic and addicted to computer. I know him also as a good man. During my visit I have to sit in his work desk at home where he is showing me some money making sites he has discovered and discussing with me their terms and condition. Till then it was ok. But suddenly I clicked on the history of his web browser and you don't believe tons of obscene websites popped up on the screen. I get quite puzzled. He says its cheering & good for time passing. But I have not liked his attitude & moral and this little awkward experience has changed my view about him whom I thought a very good man. Do you feel what he says is justified or I am correct?