Simplify the following text for a Grade 11 native English-speaking person.
Original: Sixty-nine or 69 , also known by its French name soixante-neuf ( 69 ) , is a group of sex positions in which two people align themselves so that each person 's mouth is near the other 's genitals , simultaneously performing oral sex .
Simplified: 69 ( or spelled sixty-nine ) is a sex act in which two people align themselves so that each person 's mouth is near the other 's genitals , simultaneously performing oral sex .