Licking balls is a specially cultivated talent. For one thing, it required the dimming of the olfactory senses lest you keel over from the alkaline smell. Then there's the tendency to bite the lump out of a sense of playfulness, and the Queen's rules strictly forbid this breach in oral sex etiquette. Then there's the stratum of female who'll suck cock but avoid the sac. All we can say is appreciate the ball sucker in your life. Send her a thank you note and invite her to watch this movie with you. She might pick up an extra pointer or two.