Because proper-tea is theft.
Because if you take only one he will drink all your beer.
What's the Difference between a tea bag and a used tampon - I dunno... - I'm never drinking tea at your house again then!
Because it was Stalin! (Sorry. Communist jokes aren't funny unless every gets them.)
Because nobody wants to hold an erection.
Because all proper tea is theft.
Because he believed that all proper tea was theft.
Because property is theft.