[Well...Mettaton was designed to be a lot of things, and "comfortable to hug" wasn't exactly high on the list of priorities when his body was created - at the same time, it could be a lot more awkward than it is (this could be the rectangle we're talking about), and honestly, he'd be lying if he said he minded the idea at all.]
Darling, you don't have to ask me for that! Come here.
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Darling, you don't have to ask me for that! Come here.