You knew the scientists were going to be all over this.
Ed Yong at Not Exactly Rocket Science takes this special occasion to talk about the very strange penis of the alligator. 
David Shiffman of Southern Fried Scientist talks about the mating habits of his one true love -- sharks -- in "50 Shades of Grey Reef Sharks". 
Maria Popova (not a scientist, but her blog Brain Pickings is amazing) tells us why there are roughly 871 special someones out there in the world for each of us. 
While those folks at Scientific American tell us about a rose grown in space.  It apparently smells different!
And of course, who could forget the Valentine’s Day cards  for that special scientist or science geek in your life. (Mental Floss)
Happy Valentine’s Day!