Here's a weird thing I've noticed, the word "arse" seems to have been considered quite an offensive word (particularly on TV) up until some point in the late 80's as I was watching The
Young Ones and the word "arse" is only said once throughout the whole of series 1 and 2! Instead, the word "bottom" is used quite a lot. Compare this to ironically Bottom in the early 90's and the word "arse" ...