It's a question most likely to strike you mid-lick. With a quick glance around you, you carry on, the pleasure of not wasting any of the yoghurt outweighing the shame and uncertainty, the question lingering as you tongue the last bit stuck to the lid: is it really OK that I'm doing this?
The Naomi Campbell ads for Müller a few years ago went a long way to making the lid-lick more acceptable. However, there are limits and nuances. When eating a Fruit Corner-style yoghurt, for example, it’s OK to lick the yoghurt itself, but not so OK to slurp up the syrupy fruit bit. And in no circumstance must you ever take a taste from the replaceable lid of a large, sharing pot – even if you’re the only one eating from it.
And with any yoghurt, you don’t want to be taking more than two licks if you're in public – one is ideal, two looks acceptably indulgent, three is gluttonous and infantile, frankly. Even if you don’t manage to get all of the pleasantly concentrated goo from around the edges, never ever go beyond that second lick.
With any luck, the lid-licking dilemma will soon be a thing of the past, if news of technological advances in this area is to be believed. But where technology marches forward, nostalgia is hot on its heels. All while marvelling at liquid-repelling lids and how far yoghurt has come, MCs will surely complain that the yoghurt-eating experience is just not the same without the treat of licking the lid – and the accompanying dollop of shame.