Suggestions for Lovers
Since there’s no worded suggestion, one must assume that it’s the illustration that is meant to impart some guidance. What I’m getting out of it is that you should take your lover to a quiet spot in the moonlight, stick out your tongue, and see what happens.
This card didn’t go through the postal system and appears to have been hand-delivered to Great-Grandpa Phil, presumably by some young lass who was making her intentions clear. Looks like Phil had a happy Valentine’s Day; I hope you do the same.