Some Things I Don't Understand

Maybe I should know these things, but I don't.

Why have my knees started sweating? Not all the time, but now and again I get this sensation of my knees sweating. It has nothing to do with doing any physical activity, they just start sweating. I wonder if it's like the sensation where people who lose limbs still feel them there. Phantom arms, etc. I think I have phantom physical activity and I break out in a sweat arbitrarily. If you look this up on google, it offers a bit of help with "do penguins have knees" question.

Why is some toothpast blue? Why not white and always and only white. White is pure, clean looking. Teeth are normally never blue. So why brush with blue toothpaste?

Why is my ass sweating more the older I get? Is it because I sit on it more? I noticed it when I was in motorcycle school. Ok, the motor is right there between my legs heating up my ass, but I've never had a sweat problem. Now I worry that my jeans have wet spots on the knees and ass and people are too polite to say your ass is wet.

These are things I have been wondering about lately and have no need to share with anyone. So, don't be disgusted. Just ignore me like you usually do and if I care about finding out why, I will let you know.