This reminds me of a conversation my friends and I had with our "major blonde friend" who was talking about her upcoming wedding.
Conversation goes something like this
US: So "A" you excited about getting married?
A: Yeah but I really need to lose some weight first
US: We hear ya. That was something we all wanted to do too when we got married.
A: Yeah because I figured out that since we are going to Japan for our honeymoon I needed to lose a LOT of weight.
US: Why because you are going to Tokyo?
A: Well because the flight from here to Tokyo 17 hours long and the flight home is 13 hours long.
US: Yeah that's the international time zone.
A: No it's not it's all the fat American's traveling to Japan make the plane slower but coming back it's all the skinny Japanese that make the plane fly faster. There is no excessive weight lag coming home because they all eat rice and fish.