What's an ideal like?
Step 1: Choose a physique
Muscular/lean, tall/short, long hair/short hair, fringe/no fringe, cute smile/sexy smirk..
Step 2: Add a colour
White, black, yellow, pink.. endless possibility
Step 3: Add a personality
Nice/dickhead, gangster/good, likes sport/likes gaming, sociable/quiet, confident/shy
Out of a shadow of a person, create someone based on fragments of distorted knowledge. Just like a faceless silhouette, you're now an idealisation.