not only lips
Not sure what you mean.
PM me with some photos so I understand

not only lips

I blame Simon Cowel... teeth so white and perfect that they look more false than actual false teeth. I like natural things to look natural. The Queen Mother had perfect teeth.
I did think that, but I was unsure about the numbers. I remember at school for some reason we added H2O2 (no idea of the concentration) to animal blood, and got lots of red foam. Quite what the point of that experiment was I have long since forgotten.
(Edit. It's come to me. Peroxidase enzyme was the subject of the experiment)
Vanity should be one of the seven deadly sins.
I take a pride in my complete aversion to anything to do with cosmetics and the beauty industry.
It’s a reverse snobbery of sorts.

I'm lucky to have been born stunningly beautiful
I'm new to this debate, but I remember a character in a film saying she had corrected dentistry because she did not want to have British teeth. I understand that and sympathise with the wish. British teeth are often or mostly yellowed, crooked and down right unappealing. White teeth are so much more appetizing to the eyes. Yes, Americans' do go in for teeth straightening and whitening and I am so glad of it.
Personally, my teeth have always been naturally well set and the toothpaste I use keeps them white. So, to those who seem to think yellow teeth are de riguer, do everyone a favour and clean them and whiten them - or if not, please do not turn our stomachs at the view of your ghastly yellow, unwashed teeth, or failing that, refrain from ever smiling. All American vistors (and British ex pats) to British shores will thank you so very much.
I think you've watched stuff like Chitty Chitty Bang Bang too often!
Should I add another comment about the lack of intellectual depth in certain parts of Scotland?