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I assume this isn't meant too serious, but as far as I know cloud's do not necessarily block UV radiation. At least one can still get sunburned even on a cloudy day.

Clouds do very much attenuate UV radiation; how strongly they do so depends on their thickness/density. See ballpark figures here: https://www.epa.gov/sunsafety/calculating-uv-index-0

Clouds do not block junk food ads. They actually produce them :)

Food seeking behavior =/= thin males =/= thin citizens. Lot of weak linkages happening there.