Original sentence: In Victorian cultures and those that proceded them, the 'X' or kiss has been taken by the pornographic film industry as 'XXX', but this theory sounds suspicious.XOXO, typically to express affection or  good friendship at the end of a written letter, email or SMS text message, but definitely NOT an official way to end a business email
Edited sentence: In Victorian cultures and those that proceded them, the 'X' or kiss has been taken by the pornographic film industry as 'XXX'.XOXO, typically to express affection or  good friendship at the end of a written letter, email or SMS text message