To go down on your
girlfriend or wife.
To cause extrem pleasure for your
girlfriend or wife.
The best thing a guy could do for his girlfriend or wife.
An unselfish act.
If done correctly, you could give your girlfriend or wife an orgasm or multiple orgasms.
Some thing that takes practice.
Some thing that can be fun if you give it a chance.
To lick a womens clitoris, vigina lips, and vigina entrance.
Can be done while fingering your girlfriend or wife.