How one drinks their cup of tea depends on only the person drinking it. The tea connoisseurs would recommend drinking tea black with no sugar, honey, lemon etc added. But there are many teas that are enjoyable with a little milk, or just sugar or both.
Drinking tea is a ritual. For some its an art. If you love tea, especially freshly brewed tea - these rules will make the experience better. Enjoy the time you spend with tea.