Insides

These donuts, the outside breaks apart easily and the insides are light and fluffy, delicious!

The hot chocolate is warming my insides.

Your insides are technically your outsides.

Please, apply more strength upon cleaning the insides of the armoires. They're rather crusty.

His glance makes my insides melt.

Concern had started to gnaw at his insides.

Tom's outsides no longer match his insides.