Playboy

Playboy is an adult pornographic magazine that showcases various women in either scantily-clad apparel or not wearing any clothing at all. It was formed in 1953.

Relation to Metal Gear
Playboy acted as the basis for the magazine weapon in Metal Gear Solid 4: Guns of the Patriots, where it could be used to distract the enemy and to replenish psyche by flipping through the book in the model viewer.