The warm, fresh, and yearning-to-be-awakened scent emitted by the vagina is inherently sexy. Therefore, it's not surprising that this smell, which can remain on old underwear, is always popular. If you get excited when you smell dirty underwear, don't worry, you're not alone. The preference for old underwear is quite common, and I myself have some personal experiences with it.
Sell my old underwear as something for sadists to use.
I once sold my old underwear and really enjoyed it. I will definitely do it again. All along, it's been men who are interested in my old underwear and then buy it, but this is just my habit - I don't mind any gender of people buying it and enjoying it.
As a female lead, and being in the "female lead" sector of the BDSM scene, this provided me with a channel to sell old underwear and "dirty underwear". Submissive men and my own slaves would arouse their sexual desires by smelling the dirty underwear and gain a peculiar sense of satisfaction. These men were usually locked in chastity cages and sent to "enjoy" the old underwear, which was part of our teasing and rejection scenarios.
This does not mean that only people in BDSM scenarios or Dom/Sub relationships are addicted to or enjoy this old underwear fetish. Many people enjoy the erotic experience brought by old underwear, but they do not have any romantic or D/S relationship with the wearer, and they themselves do not consider themselves to have a fetish.
Why does smelling dirty underwear make people feel excited?
For those who include the vulva in their sexual activities and attraction preferences, the fresh, natural musk emanating from this sexual central hub is a natural and immediate form of stimulation.
Of course, there are other forms of sexual behavior, but the vulva is usually hidden and not exposed to the public or consumed by them. In terms of sexuality, it is only used for private self-stimulation and for connecting with pornographic partners.
In this way, the vulva and the vagina were regarded by everyone as the "forbidden fruit"; alluring, mysterious, out of reach, yet highly desirable.
Pussy Scented
Simply worn through the day for that natural, intimate musk. Or perhaps worn through the day plus the night, for a more powerful aroma.
With Extra Pussy Juices
Worn during and after masturbation. The additional vaginal emissions from arousal and climax from masturbation, with the potential for other fluids from squirting & urethral ejaculation, make for deliciously messy underwear.
With Post-Sex Fluids
Worn during and after sex with a partner. This could include a ‘creampie’ deposit, which is penis cum after it has been inside a vagina. This has a niche appeal, usually to cucks/those with a cuckoldry and/or humiliation kink.
No Kink Shaming!
If you get a thrill from smelling the underwear you've worn, then you have nothing to feel guilty about. This is no different from other sexual preferences. As long as the other person gives their full and voluntary consent, as we discussed earlier, there's nothing to be ashamed of. You're not a pervert (of course, unless you also get pleasure from being called a "dirty pervert", which is a completely different matter).
In my memory, the popular culture of the 1980s, 1990s and 2000s - TV sketches, sitcoms and the like - often referred to people who "smelled their underwear" as "bad guys", creating a stereotype: they were sneaky, failed in love and romantic relationships, had no appeal for typical gaze-oriented men, they secretly and shamefully indulged in this oddity, making others both laugh and feel disgusted. Especially those women who originally wanted to have a relationship with them and might seek sexual or long-term relationships.
I sincerely hope that society can abandon this primitive and judgmental mindset. In the 21st century, people should be able to explore their sexual orientation and preferences in an appropriate environment, and be proud of them, without fearing that their personality will be attacked or their sexual preferences will be ridiculed.