There are now many morris sides, not just in England, some following old traditions, others adapting them or inventing new dances. All are fun to watch and most of them are a really joyful lot who delight in rousing the streets from its everyday life. It’s wholesome and it’s free! (Dress optional.)
As for today’s song; well it’s another obscure element of folk culture. Whatever ancient significance it once had is more or less lost now, but some of us enjoy it anyway, just like the dancing.