If the rain comes, they run and hide their heads
Were the kids you appear to be referencing in your comment taught to fear rain for some reason...by adults?
My experience has been the opposite...
(just curious)
Getting wet or cold; neither "causes" sickness...that theory was debunked years ago...
I commute to work in cities for some of my gigs, but don't live in them...my leisure time is mine...getting wet..?...It's just not that big of a deal when I have no pressing business...fear of getting wet is no reason to miss the magic of standing out in the rain...
We lead different lives, my friend...and both are OK...
Nothing bullet-proof definitive here, but the consensus certainly seems to be that colds are caused by virus entering the respiratory system, nothing more.
Absolutely and thank goodness for that variety. I was just putting up an explanation for why kids like playing in the rain and why adults typically do not.