Bitter?

A girl at work came in yesterday and gave me a bunch of her black tea. She said she wasn't going to drink black tea anymore.

Why not?, i asked.

I'm only drinking red, green, and herbal teas now.

. . . But why?

It's too bitter for me, she replied. Then she took a big ole swig of her convenience-store coffee.

I didn't understand how black tea could be too bitter, but coffee was just fine. I personally don't drink coffee because it's too bitter. But i didn't probe too deeply, because she'd brought some really good flavours, and i really wanted that tea.