Complete With a Water Slide

Donna flirts and he ignores the double entendres in her sentences. She thinks he's somehow missed the signs like Jack Harkness isn't an expert flirt and makes a more obvious advance. Where once he would have caved or more likely be the one making the moves he sidesteps her clumsy kiss because what he's found with Ianto is not worth risking for a quick fumble no matter how pretty the lady.