I have a student who is both thoughtful and shy.
Today, I taught my last Monday class of the school year, and one of my students had thought to provide a bouquet of roses for me. However, actually giving them to me proved too much, and instead, he opted to put them on my piano and flee when my back was turned for a moment.
Therefore, since I don't officially know they're from him, I am forced to assume they're either from a secret admirer or the universe at large.
Thank you, the universe!