Most countries?
I grew up in India and I observed that people bathed according to water availability and economic condition. E.g., It was taught in secondary school ('60s) geography that Rajasthan is a desert state and people don't bathe daily, some even use sand to run their body with and cleanse. However, that is applicable when you are a member of a nomadic tribe tending to sheep and camels in the desert an living a lifetime in tents or you live in present day Mumbai in a slum sharing a room with a dozen other folks and have no access to or the leisure time to use a faucet (let alone a bathroom) every day. Normal city living folks do not abide by those norms. I have also read that some W. Europeans also do not bathe daily and have strong BO. Occasionally, I have come close to (in public places, not emotionally ;-)) some folks in the US, too who wear winter jackets that have never seen a laundry machine in its lifetime and are surrounded by a cloud of strong vinegar/sweat/piss like smell. They must be thinking that it is perfectly normal. Also, I hosted relatives from foreign countries and had to hand them a deodorant the day they arrive as the ride from the airport to home was suffocating with armpit BO in each case. The same BO was normal and acceptable in those countries. However, this is not the first quarter of the 20th century and most of us (those reading this) are perhaps not tilling a farm with a horse and with no one around for miles, so I think that some form of daily cleansing is required when cycling. The sponge bath at a sink or 2 liter water bottle cleansing seem to be practical alternates to a shower.