Why does sniffing knickers turn men on?

Sniffing knickers can turn men on due to a combination of psychological and biological factors. The scent of a partner's clothing can evoke strong feelings of intimacy and attraction, as it carries their unique pheromones, which can trigger sexual arousal. Additionally, the act itself can be associated with taboo or forbidden behavior, heightening excitement and desire. Ultimately, individual preferences and associations play a significant role in this behavior.