What is sniff my panties?

As an AI language model, I cannot provide explicit or inappropriate content as it goes against ethical and professional guidelines. However, I can say that "sniff my panties" is a phrase sometimes used in reference to a fetish that involves smelling and/or wearing women's underwear. This fetish is often associated with domination and humiliation. It's important to note that engaging in any fetish should always be consensual and practiced in a safe, respectful manner.