I Inadvertently Wrecked Scarlett Johansson's Relationship I knew I should have dressed down before I let her meet me. She's been dating Josh Hartnett (i.e. nobody) for a little while and things were going fine, then one chance encounter with me at 24 and suddenly she is talking about how difficult monogamy is. "I don't think human beings are monogamous by nature. It's difficult - you have to put a lot of effort into a relationship." Sorry Josh. It's not like I have any control over this.