Just try to make things clear. Erotic, nudity, pornography, sexuality and sensuality are all different words and should not be mixed or confused altogether.
If you see photos of African women totally naked, bathing or just posing, that is nudity. Nothing else.
If you see photos of young models posing in studio, this is mostly nudity and erotic.
When there is more exposure with the erotic acts, then that is sexuality or sexal acts.
When the subjects are engaged in explicit sexual acts with full exposure, then that is pornography.
Anyway, this is enough. I hope I'm not confused here.