The word you would look for in the dictionary in 5th grade.
john: yo jeff! the teacher's giving out dictionaries!
jeff: *turns to page 530*
jeff: yo john! I found sex!
john: pogchamp face
(chiefly with reference to people) sexual activity, including specifically sexual intercourse.
"they enjoyed talking about sex"
It is a act that two or more people have it is how you make babies first you enter the penis in the vagina and sperm produces and sometimes it ends up with a baby.
Jordan and Alexia have sex every day and cant stop
An excuse to put your fanfictions in urban dictionary.
Jane: Hey, why's there a bunch of fanfictions in the definitions of Sex?
Jack: I don't know.