Just some feedback, I think this would be much more compelling with better choices of messages. It feels like the first two words are setting something up and the third should have some kind of payoff, but a lot of the messages don't work like that. The third word is usually predictable and obvious and something of a letdown "Never give....up".

There's really nothing in that list that is interesting enough to send to anyone in my life. I'd be wanting to send something very specific like "Remember cycling Iceland?" or "Soy chicken success" or something.

I get your concerns about "writing something inappropriate" but you could probably let people choose 3 words from a list of a few hundred pre-vetted words?