Excluding one-time episodes when a character only crossdresses when the plot calls for dumb "man in a dress, omg!!!!!!" jokes. I'm always open to recommendations! See https://trakt.tv/users/bangiras/lists/read-me for ways to contact me if you don't have a Trakt.TV account.
AKA perverse deviant sexual stuff. Not quite hentai (porn), yet not work-safe one bit. Don't judge me too hard, hahah. This list isn't just for anime, but you're allowed to laugh at non-anime series being on a list for "ecchi," I know my unfunny ass will!