I remember believing during my youth that presidential candidates routinely voted for their opponents as an act of social grace and a rejection of pride. It didn't matter if you cast your ballot in secrecy. God sees everything. Right is right, so you just do the right thing.
This belief was an indicator of how seriously I took my Catholic school education. Moreover, I don't think my belief that candidates voted for their opponents was that far off from what I had been taught in school: "Don't let the left hand know what the right hand is doing," "love thy neighbor as thyself," "do nothing from rivalry or conceit but humbly count others more important than oneself."
And so I believed that it would be unseemly for politicians to vote for themselves.*
I hadn't even begun to learn the meaning of unseemly.
*Some claim that Zachary Taylor voted for his opponent because he didn't think it would be right to vote for himself, but how can anyone know for sure.