OK. This is off topic a bit but it's like this: I don't much like tea or coffee—except when they're very good. But anyway I drink both and that includes really bad stuff—with one exception, I will not drink either with milk/cream or sugar. I'll tolerate maybe a single teaspoon of sugar in coffee but any sugar in tea I find repulsive and just won't drink it. So, decaffeinated coffee falls within the range of 'acceptable' beverages I'll drink, but I'd prefer the real thing. (I lied a bit there, I also find decaffeinated tea truly repulsive and I never drink it but then it's so rare (at least in my circles) that I never come across it.)

As I said I really enjoy really excellent tea and coffee but I find getting what I like very difficult at a price I can afford. With tea, I used to drink good quality Darjeeling but it's almost impossible to get nowadays (it's over $1,000/kilo). Adding anything to that except perhaps a slice of lemon would be a crime. The cheap stuff that's now sold under the name is little more than tea dust, a good cheap Orange pekoe is a much better deal. I also love good green tea but again the only way I can guarantee to get what I want at a reasonable price is in the tea markets in Japan and I'm not there very often.

Similarly, truly good coffee is also very difficult to get, and it's fiddly to prepare. Even with good beans and an espresso machine I'll more often than not make a suboptimal brew.

I've this theory that many people who add milk and sugar to tea and coffee do so to mask their bad quality although they're not necessarily aware of the fact as it's so rare to get truly good product.

Incidentally, I was introduced to tea somewhere about 4/5 years of age when my mother gave me a weak brew with milk and sugar. I recall that about the time I started school telling my mother to stop putting milk in the tea, the following week I told to stop adding sugar. I've taken that way ever since.