I have just come down after my bath, wrapped in a towel (TMI) to post again as I have realised what a dumb thing I said.
So, correction: It IS personal !!
The banging and thumping is all an expression of pleasure. Like when you get them out of their cot in the morning, they are all squiggle and squirm and flapping hands and feet - because they are so delighted to see you paying them attention. The fisticuffs at feeding time are the same thing.
Haven't you ever been pushing the buggy and have a stranger talk to your baby - you can't see baby's face but you know he is smiling because you can see the arms and legs waggling. When he has his mouth full of boob he is even less able to smile...
Please don't give up just because of that.