I'm gonna be so bold, @sumi . I'm copyng your garden humor post to over here. Now, you are the Administrator so you can delete this whole thing. I would NOT be offended. (Now, if I was really foolhardy, I'd copy your "human brain" poster and put it in Garden Humor" .)
I fall in love on just about a weekly cycle but I once choked on an exam. I could hardly remember my name! This was a result of almost no sleep while focusing on something unrelated to the subject matter ..! I thought I knew that silliness like the back of my hand. Didn't matter when I could NOT think!
Singing? I should be Signing but like most people, I sing when I'm happy . Then, I don't much care what I sound like. One thing, my voice has changed with age. Leonard Cohen had the same experience. He blamed it on cigarettes and whiskey. I can only use half of that excuse, well, maybe 25%.
BTW. Cohen's voice was claimed by some to have improved with age. I just try to sing lower and pay more attention to rhythm. No one has asked me yet to sing "Far, Far Away," but I haven't tried it out yet on "Hallelujah!"