Oral sex is sex with your mouth.
If a guy (or girl) stimulates the vulva with his mouth or tongue it’s called eating out, going down on or eating pussy.
If a girl (or guy) stimulates the penis with her mouth it’s called a blow job. This is also referred to as ‘genital kissing,’ ‘giving head,’ ‘cock sucking’ and ‘fellatio.’
In the Netherlands about 75% of the couples engages in oral sex.
If people in their teens start a relationship it normally takes some time before they try oral sex. In most cases this happens after they had intercourse.

Safety

How to do it? See: blow job & eating out