When a character's head is a penis, or at least glans-shaped like one.

Not to be confused with

• head_penis (penis on head such as penis_horn or penis_nose)
• dickneck (detached head with penis as a neck)
• dickface (penis with its own humanoid head/face)
• glans ("head" of a normal penis)

Other related tags

• cock_transformation
• penis_creature
• unusual_penis_placement
• head_pussy (pussy on head)
• neck_pussy (neck/head replaced with pussy)