Loved by pre-school audiences in the UK, US, Australia and Latin America, Peppa Pig is arguably one of the most recognisable - and popular - cartoon animals in the world. It is perhaps no wonder, then, that the programme's decision to introduce its first same-sex couple has made waves. During an episode titled Families, which first aired on Tuesday on Channel 5 in the UK, where Peppa Pig is made, the eponymous character was introduced to friend Penny Polar Bear's mothers. While drawing a portrait of her family, Penny explained: "I live with my mummy and my other mummy. One...