People tweeting stuff. We allow tweets from anyone.
RULES:
For real. Everytime I get in the shower I end up having to point the showerhead away and cower from the cold water and I could have just turned it on first?
Love that for once we're mostly not mocking them and are actually sharing similar experiences, we've all had one of those moments.
I genuinely can't tell you what my thing is. Other than that deep down, I know the feeling and know that I have one. This has happened to me before. I have felt this feeling. I just don't remember what about. I'll keep you guys posted if I remember.
For me it was about 5 years ago, I'm over 30, realizing that my parents and extended family lied to me about watermelon seeds growing in your stomach.
It was just so ingrained in me as a child that it took more than 20 years for me to question it.
Watermelon is so much easier to eat now.
Similar dumbassery: Taking a shit and seating there for 20 minutes inhaling feces stench when I could do a flush as soon first turds come out and stay on the toilet until I can't feel my legs without a farty atmosphere in the bathroom.
Although, if you're a ball haver, this is a great way to get poo water splash on your balls...
Its okay buddy. I thought ovaries were in the boobs till I was like 20.
Pee is stored in the balls
I had a very cold shower once until I realized the way that one knob faucet worked was you had to turn it an insane amount to get to the hot water.
If you still have that, know that it can usually be adjusted by removing that one screw you see and go behind the knob and adjust the hot water stop.
Really changed the shower comfort over here, as it used to be real hard to find that sweet spot between lukewarm and scalding hot. 
I mean, having lived more than half my life with water catchment NOT county water, letting the water run is wasteful and can mean you go without during drought. That means turning the water off while scrubbing, too. I've learned to embrace the cold on purpose at the end, with the closing pores n all.
I don't think I've ever used a shower where there was no way to avoid an initial cold spray while standing in it, so it never occurred to me to turn it on first because it wasn't an issue.
I can't think of an incident like this off-hamd for myself, but I once dated a woman who didn't know that women have a urethra. She thought the urine just came out of her vagina. She was ~23.
I don’t like wasting water, so I just stand at the far end and try to start wetting my hair until it gets warm enough to fully step in.
What's the difference between pointing the shower head away and standing outside at first?
Geometry
I prefer to cower in fear, actually. Too much of an effort to lean in and start the water beforehand. Plus now I usually shower in a standing stall so I have to be in it to turn the water on anyway. Just gotta set the angle and the cower space just right.