There are many different accounts and myths surrounding Aphrodite, she has two origin stories, but she is always seen as the goddess of love, passion, pleasure, beauty and procreation.
In Hesiod's Theogony, Aphrodite was born from the sea foam off the coast of Cythera. A slightly twisted tale, the sea foam was formed when Cronus (a Titan) cut off his fathers (Uranus) genitals and threw them into the sea, it was from the foam created from Uranus' Genitals that Aphrodite was formed.
She has another less violent and twisted origin story, in Homers Iliad, she is the daughter of Zeus and Dione. Plato states that these two origin stories actually pertain to two different entities, Aphrodite Ourania, the transcendent Heavenly Aphrodite and
Aphrodite Pandemos, Aphrodite of "all the people".
There were many cults tied to Aphrodite, she was even the patron god of prostitutes. She was not always worshiped in a sexual way, in Sparta she was worshiped as Aphrodite Areia, which means war like. So in Sparta and on Cythera there are statues of her bearing arms as a goddess of war.