Here's proof that these paparazzi type pictures are taken for publicity with everyone's knowledge. Owen Wilson's manager, or whoever handles this stuff, picks up the phone and calls these people and says, "Owen will be at such and such intersection at around 2pm" and everyone gets their cameras and heads out the door. Owen Wilson gets to ride a bike along with a little free publicity, and gets to show he's an active type guy, everyone sees his girlfriend, the paparazzi company sells the pictures to The Daily Blabber or whoever wants them and everyone goes home happy. Figure out what the proof is yet? It's right there in front of you.
His girlfriend agreed to ride a bicycle on a cloudy 47 degree day. There's your proof. I had a girlfriend once that was cold on a beach in Miami in June. I'm not kidding. I had another one that used a space heater where she worked all summer because the air conditioning made it "Way too cold". There was no way this woman was going to agree to go for a bicycle ride in the cold, unless it meant you got to see that she was dating Owen Wilson, but I'll be honest, I'm not really sure how proud of that I'd be to begin with.