Masturbating in front of a partner can be an intimate and arousing experience for many people. The reasons behind why it turns someone on can vary widely from person to person. Here are some possible secrets or factors that may contribute to the arousal associated with masturbating in front of a partner. 

• Exhibitionism: Some individuals are turned on by the idea of being watched or exposed. The thrill of being seen in such a vulnerable and intimate act can be a major turn-on.
• Voyeurism: For the partner who is watching, the act of observing someone they’re attracted to engaging in self-pleasure can be incredibly erotic. It satisfies their voyeuristic desires.
• Enhanced Intimacy: Masturbating in front of a partner can create a unique level of intimacy and trust. It demonstrates a level of comfort and vulnerability with that partner that can be deeply arousing.
• Communication and Connection: It can serve as a form of communication about desires and fantasies. Sharing this experience can lead to a deeper understanding of each other’s bodies and what turns each person on.
• Mutual Pleasure: Sometimes, one partner masturbating can be part of foreplay, leading to a more satisfying sexual encounter for both partners.
• Fantasy Fulfillment: For some, it fulfils a specific sexual fantasy or fetish. Engaging in this act can be a realization of a long-held desire.
• Variety and Novelty: Adding new experiences to your sexual fantasies can be exciting. Masturbating in front of a partner can break away from routine and add a sense of novelty to your sex life.
• Control and Self-Expression: Some individuals find that masturbating in front of a partner gives them a sense of control over their own pleasure and can be a form of self-expression.
• Empowerment: It can be empowering to openly enjoy one’s body and one’s own sexual pleasure. Sharing this with a partner can enhance feelings of self-confidence and empowerment.
• Mutual Exploration: Engaging in self-pleasure in front of a partner can be a way to learn more about each other’s bodies and preferences, promoting better sexual communication and connection.

It’s important to note that the arousal and enjoyment of this experience should be consensual, and both partners should be comfortable with it. Open communication is key. Some individuals may not be comfortable with this kind of activity, and it’s important to respect their boundaries and desires.

Overall, what turns someone on is highly individual and can be influenced by a combination of psychological, emotional, and physical factors. The key is to prioritize open and respectful communication with your partner to explore what brings pleasure and satisfaction to both of you.