Like a murder. Or spontaneous coitus with Leonard.
Penny : Oh, I'm just doing this awful workout. I hate it.
Sheldon : Well, if you hate it, then why are you doing it?
Although I could ask the same question about coitus with Leonard.
Penny : I don't know... I guess I like that I hate it. It makes me work harder.
Sheldon : And to clarify...
Penny : The exercise, Sheldon.