Love Songs

Cats are expressing their affection when they use a call that sounds like a high pitched meow mixed with their purring. Queens use it to call their young; males use it when approaching a female in heat; and altered cats will use it to call their masters when the cat is lonely.
For humans, use the tip of your tongue to "roll your R´s" combined with a "high, low, high" vocalization with a sing song quality.