Only if it has been one of my date slices I've been eating because there are a lot of lovely oaty crumbs. Certain other crumby things I might dab up with a damp finger.
There's a chocolate mousse I sometimes have as a treat and I always want to lick the container out but it's too narrow.
When DDs 1 and 2 were at a guide camp (they weren't guides, too young, but I was a leader so they came with me) and had yogurts for pudding, they licked the lids after pulling them off. The other guide leader was horrified but I don't see why. There's nearly always some yogurt stuck to the lid. Why waste it. Tongues are more efficient than spoons.
Not yuck, especially if no-one's looking
.