On Vacation in Japan and I ejaculate much further. What is the cause?

Im from the US and usually when I ♥♥♥ it's a dribble like 30% of the time and shoots a few inches the other 70% of the time. While in Japan I'm shooting 2 feet atleast. Is it due to the amount of walking? The food? For context i had a office job and I am relatively sedentary at home.