Back in 1994, my Grandfather started off his day as always with taking a shower. Now, he suffered from high blood pressure and was in his 60s and he liked cold showers.
Anyways, he ended up getting stroke/brain hemorrhage and died. Whether it was a co-relationship or not, as kids we were told from that point on not to take pure cold showers (at least let it be lukewarm).
I personally want to take cold shower but this one event from my history keeps me from taking it.