There are key cultural differences between Japan and the West. It's not just in linguistics, but in eroticism as well. Way back in 2005, Konami game producer Akari Uchida was frank about those differences.
"You Westerners, listen," Uchida, who had just designed wrestling game Rumble Roses, told Kotaku. "Eroticism is not only about nudity. That is part of it."