Children of the 80s were probably raised to blindly comply with adults; what they said went. You gave your aunty a kiss hello, and your nan a hug goodbye, even if everything in your body screamed 'no, I don't want to!' through fear of being rude, or at least that's what your parents worried about.
Here's the thing, when a kid doesn't want to do something a lot of adults can tend to take it personally when really it's not about them. Not wanting to hug doesn't mean they don't love their nan it means they just don't want hugs right now, and it should be their body, their choice.
