It can be a crime because it counts as child pornography, if there's an image of someone under 18, and it doesn't even matter if they took that image of themselves and shared it willingly.
Hal itu bisa jadi tindak kriminal karena termasuk pornografi anak, jika ada foto seseorang di bawah 18 tahun, dan bahkan tidak penting bila mereka sendiri yang memotret dan menyebarkannya dengan sadar.