CraveOnline has posted their interview with Eli Roth. He talks about the film, Keanu and sexual manipulation among other things. With respect to the film he says:
It’s the free pizza theory. When I was writing this with Nicolas, we have a theory that no one would ever say no to a free pizza. If you’re at your door and you’re hungry, at 3 in the morning if a free pizza shows up, do you take the pizza? That’s the real question. Evan’ a nice guy. He doesn’t go looking for it. It comes to him but he offers the tissue. He lets them in. He gets in the bathroom. He does all these things that are on the surface.
At the beginning, there’s little hints. They’re not having sex. The whole house is dominated by the wife. He’s kind of relegated to the corner. He’s the architect and he’s designed a world that he has this wife and her art has slowly taken over everything and she runs the show. She’s still taking the kids to the beach on Father’s Day because they had a beach trip planned. She’s not saying, “Well, let’s cancel the whole thing if you have work, honey. We’ll be here for you.” She’s still leaving. There’s underlying hostility at the wife that he buries under this false sense of happiness.
The kids are making fun of his hair. They’re going, “Why don’t you cut your hair?” That’s his identity. That’s the ultimate emasculation when the girl’s do cut his hair. I wanted to almost use chopping off hair and destroying statues as a metaphor for the way I chopped off heads and body parts in my other movies. If you think about what I did to people in Hostel and what the girls do to the artwork, they’re very similar.