Beltane is a deeply misunderstood holiday, from the horror of “The Wicker Man” to Jonathan Coulton’s humorous “First of May,” to the sexy pictures of scantily clad humans spinning fire at the festival in Scotland, it would be easy to view Beltane as nothing but random sex with strangers outdoors around a campfire, a holiday dedicated to lust and hedonism and the baser of our human needs and instincts. And that would be a mistake.