Every theory presented as a scientific concept is just that; it's a theory that tries to explain more about the world than previous theories have done. It is open to being challenged and to being proven incorrect.
“I wrote some bad poetry that I published in North African journals, but even as I withdrew into this reading, I also led the life of a kind of young hooligan.”
“Before marriage, a girl has to make love to a man to hold him. After marriage, she has to hold him to make love to him.”