Gamasutra has an article called "sex in videogames"
I'm not gonna talk much about it, just enjoy the quote :[BLOCK]More importantly, the effect of sex on people's lives isn't really that random. We may not know exactly who is going to click with whom, or when, but the consequences can often be guessed. Isabelle and King John's meeting was sheer coincidence, but John's behavior was in keeping with his character, and anyone could have predicted Hugh the Brown's reaction[/BLOCK]And ofcourse don't forget to read the rest of the article

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