Happy Valentine's Day!
There are a lot of valentine's day greetings that were suffrage related!
Some like the one above are pretty pathetic. Give me the vote or marry me? Maybe there was a threat there, I don't know :)
But the best story I found was this one from 1915. In that year there were four states that had suffrage on the ballot for the (male) voters to decide. This was part of the campaign in Pennsylvania.