When a girl participates in her menstrual cycle and aunt flow visits a boy may engage in oral inferno with her lady parts. As this is done the girl provides her male partner with a gobby and withholds the juices in her mouth provided by said partners phallus. The boy and girl then have a massive pash sesh and create what is known as a rainbow.
Geez sally is on her period think she would be down for a rainbow?