I've got Mormon relatives. One among them lapsed, but I can't remember which one, so I can't even ask about it, for fear of asking the wrong one why they lapsed.
In Japan, the door-to-door xtians come by from time to time, and when they see a white foreigner, they get all excited, like they hit the jackpot. The assumption is that I'm christian, and will be an easy sell to bring to their church.