Today is the birthday of Johannes Brahms AND of Piotr Tchaikovsky. Poor Brahms was in love with Clara Schumann his whole life, which was tricky because Robert Schumann was his good friend and mentor, and poor Tchaikovsky was gay at a time when that was illegal in Russia. (Hell, it still might be.)
I recommend listening to the Brahms string sextet #1, which I found online here (pretty good, but find the Berlin Octet recording). And for Tchaikovsky, you can watch The Music Lovers, but then you’ll be depressed, so you’d better just put on the 1812 Overture.