Mistress Gaia's lover wanted a little pain during foreplay. She decided to use her lover's nipples. She pulled them hard and she also bit them. It was a mixture of both pain and pleasure for her as her nipples were pulled and bit. Mistress Gaia also made her lover lick her socks and her feet before she stopped dominating her and they had some mind blowing sex. Then they switched and it was her turn to feel some pain.