I dislike the term ‘foreplay’ with its insinuation that penetration is the main event; and as though anything non-penetrative is trivial and frivolous compared to the Real Business of sticking something somewhere.
But even if I were to use that term as shorthand for ‘the introductory stages of sexual activity for the purpose of stimulating arousal’, I’d still have issues with the ‘play’ part. I like my getting-revved-up activity to be serious. Not necessarily solemn, but with focus, intent and dedication. No messing about here, I want to see hunger and need in your eyes. That turns me on, more than any caress.