Do you remember the first time you were sexually excited by an image on a screen? We do! It might've been a music video to a teen-pop bop, or a particularly mushy episode of Buffy. Most likely, it was a movie of the PG persuasion, which you snuck a viewing of far from the eyes of your parents when you were nowhere near the age of Looking back, those scenes were cute.
Sex is at the core of a lot the greatest movies ever made. It is the most natural of human fascinations—a biological need we spend our lifetimes trying to understand and perfect, which explains why it makes for great drama and great comedy. The art of seduction is not unlike that of film. What is left to the imagination is often what viewers end up wanting to see the most. A tender close-up would otherwise be anti-climactic if not for its initial absence.