Different folks, different cultures finding different bodily functions/actions acceptable or not, I guess i.e.
Eat a hot spicy meal in a muslim country (my experience was Turkey), blow your nose ever so discreetly and quietly (read silently) because it and your eyes are watering profusely from the assault on your tastebuds, and watch an entire restaurant of 200 people stop eating, gasp in horror, glare in anger and many throw down their flatware in disgust and abject shock as glasses of apple tea fly from the trays of waiters. Umm - excuse me, but I USE TOILET PAPER and you can't cope with a little nose mopping!!
Later the same evening, grasp a toddler's nose with your pointer and middle fingers saying, "I got your nose" and then stick your thumb between said pointer & middle fingers and listen to 50 party goers scream in disbelief, women hide their faces in their hands making strange choking noises, men half leap out of their seats at you because their interpretation is that you just told and are showing the kid he/she is a clitoris ... meanwhile you wonder why your friend is bodily dragging you hurriedly from the room with sheer terror for your well-being in his eyes.
Anyone ever notice the Brits are so demure & well mannered they won't tear open anything with their teeth i.e. catch a British Airways flight and enjoy 100's of them trying to open packets of peanuts etc with their fingers in vain for 15 hours solid, so all you hear is constant, unrelenting rustling as you look at the emergency exit and consider it your only option of escape but the Hostie comes with another Johnnie Walker & ice, your 20th. Nor would the av. old school Brit dream of walking down the street eating anything, not even an icecream, they sit and take care of business. I got some real strange looks & hisses walking around Harrods gnawing on a Cacciatori sausage lmfao.
Spitting, well, I wasn't judging anyone at all, simply voicing my opinion as to that particular activity as others have expressed their distaste of what I do and find acceptable over the years - opinions differ and are there to be expressed, so nernie, nernie ... you can either laugh or take offence, but who gives a rat's huh?