>>6496861I'm sorry but I have to contradict you from wiki
that it doesn't specify that it has to be "shown"
in many anime in fancervice scenes like the ones in the bathroom the girls shout ""Ecchi"" (dirty) for a reason even if you can't see anything.
Ecchi (ใจใใ, etchi, pronounced [et.tษi]) is a slang term often used in the Japanese language to denote playfully sexual actions. As an adjective, it is used with the meaning of "sexy", "dirty" or "naughty"; as a verb, ecchi suru (ใจใใใใ or Hใใ) means "to have sex" or, as a noun, to describe someone with lascivious behaviour. It is perhaps softer than the Japanese word ero (ใจใญ from Eros), and does not imply perversion as hentai does.