"The best way to drink Tea is to slurp it. If you really want to experience the full range of a tea's flavors and aromas, you really need to drink it in about the rudest way possible; slurping and sloshing are involved. It is not a practise for shy indivduals or those who fear being stared at in public. There are reasons, however, for learning the proper way to taste tea- you just might want to do it in the privacy of your own home "

Source: https://www.harney.com/blogs/news/ten-weird-facts-about-tea