The word sex stems from the word sexuality. Sexuality brings many things to mind. One of these things can be what qualities you have as a person and which sex you identify yourself as. It can also raise thoughts of who you choose to have sex with, how and when you have sex and how your sexuality is regarded by others.
How do you define sex?
Below are images suggesting what sex can be. Click on the images to enlarge them and give some thought to what sex means to you. (Note: illustrations with nudity or sexual content).