“But when we say we have toothache we don't just talk of behaving || expressing toothache in this or that way!” – Certainly not, – we express toothache! ‒ ‒ ‒ ‘But you admit that the same expression || behaviour may be the expression of toothache || pain or may not be that.If you imagine a man cheating you always imagine him to use one expression secretly for himself & another for someone else, & this secrecy is not the ‘secrecy of private experience’. || Cheating is done secretly but this secrecy is not that of the ‘private experience’. Why shouldn't it be considered wrong of him to use language in this way.