In an episode of the Big Bang Theory, Sheldon tells Priya (Raj’s
sister) that Raj is supposed to protect her chastity under the Hindu
code of Manu.
Raj agrees, but Priya reminds Raj that, since he eats beef, Raj would
have to live with cows and drink cow urine to abide by the Manu code.
Interestingly, Raj later DOES drink cow urine in the form of a test
pharmaceutical for combatting shyness (which ultimately fails as it
makes him take his clothes off in a restaurant).