Happens in our place, too!
OK, I digress, but..
"You should always get the man in to open any stubborn jam jars etc."
Trick is to pierce a small hole in the top with a knife. Then it'll open easily. Seal with a bit of selltoape if you haven't consumed the lot.
Works the same with those dam' vacuum-packed coffee packets that 'her indoors' wakes me from a beer-induced, dole-waiting slumber to open.
Nowadays, having got a bit older and wiser, I stab the b*astards as soon I see 'em in her shopping bag. Only way I can get some kip 'till lunchtime, dammit.