The deceptively simple through-line for Swedish media personality and activist Liv Strömquist’s The Reddest Rose is the question: Why does Leonardo DiCaprio date an endless string of 20-something models? Her answer — in the form of this collection of well-researched, humorous comics essays — tracks how philosophers and artists, from the Ancient Greeks to Beyoncè, conceptualized romantic love. Strömquist’s signature interlocutor characters, drawn in a zine-y, flat, blocky styl