Gilda had this thing about lighting her cigarettes on gas stoves. When she was in someone's home for the first time, she would always check out the kitchen to see if they had a gas model. If so, then she knew that the next time she lit up, it would be from a burner.
Of course, this also allowed her to lean down and expose some cleavage, and should anyone take notice, she would feign disgust, but the attention fed her exhibitionistic desires despite her disingenuous displeasure.
Many Thanks to Retrophile's Oasis