From unexpected hugs to terrible knock-knock jokes, here are some reliable mood-boosters. Let’s face it: we need themKnock knock! Who’s there? Moo. Moo who? No need to cry – it’s only a joke.OK, fine, that needs work. But you know what can’t be improved upon, what is slimy-sweet perfection? Moo Deng: the pygmy hippopotamus who has amassed a global fanbase with her squishy face and sassy antics. Little Moo, who lives at the Khao Kheow Open Zoo in Thailand, has dramatic facial expressions that are instantly meme-able. She has a delightful, if ever so slightly manic, grin. She bites people in a strangely endearing manner. Even her name, which translates to “bouncy pork”, is in a league of its own. In short: she’s a chubby ray of light in what are otherwise very dark times. You can watch her livestream anytime you need a moo-d booster.Arwa Mahdawi is a Guardian columnistDo you have an opinion on the issues raised in this article? If you would like to submit a response of up to 300 words by email to be considered for publication in our letters section, please click here. Continue reading...