He normally hates it when he sees make up covering her face. It doesn't make her prettier, because she is already the most aesthetically pleasing woman he has ever met. The woman stood before him in her favorite short red dress quickly adding make up to her face for a Cal-Tech party was as appealing as women came to Sheldon, make up or no make up. Even when she's just woke up and has bed head, even when she thinks that spot on the tip of her nose is the size of a mountain.
When they started sleeping in the same bed he slept endless night unable to fall asleep because he was watching the graceful rise and fall of her chest and the delicate way she molded her hands between her pillow and her face that gave her an angelic look even his mother would be proud of.
Sure sometimes she was less bewitching, when she slept on her back and snored so loudly the neighbors were sure to hear. He soon got used to her natural pattern and her snores now helped him to sleep, because he knew Penny was safe next to him in their bed.
He watched her put the red lip stick across her lips and knew it was her secret code that she was feeling frisky. She would probably jump him as soon as they returned to from the Cal-Tech, not that Sheldon minded.
She winked the mirror, knowing he was watching her reflection, 'like what you see, Mister.'
'I always do,' he assured her.