Here it would be really unhygienic. Private is a word that hardly doesn't exist in Mexico. If you have a great need for privacy and being on your own at times you might have a tough time around here. You always have people around you so it is important to take some time off and try to find a lonely place if you need that. Another thing to think about is to take it easy in the beginning when you come here and don't start working like crazy from the first day.
Human relations are important and are more valued than efficiency here.
It is important that you are flexible and willing to help and give a hand when needed. The volunteers are expected to take care of and keep the volunteer house and toilet nice and clean. When you come from an extremely clean country it might be a bit hard to accept the hygienic standards here. But you get used to it after a while. You have to remember to use only purified drinking water when you brush your teeth.