Taboo = Erotic
The forbidden nature of pursuing someone who's "off-limits" can make the idea more exciting.
This is similar to the appeal of cheating fantasies, older/younger dynamics, or authority figures—psychologically charged scenarios.
Validation and Power
Being desired despite someone's existing commitment can feel like a form of validation: “They’re risking their marriage for me.”
It may feed a sense of power or specialness.
Projection of Stability or Masculinity
Married men are sometimes seen as more "mature," "experienced," or "stable"—traits some people idealize, especially if they lack those dynamics in their own lives.
For some femboys, especially those who desire a more "dominant" or traditional masculine figure, married men may symbolically represent that.
Fantasy vs Reality
The attraction is often more about fantasy than actual intention. People enjoy imagining taboo situations without necessarily wanting to act on them.
Internalized Shame or Rebellion
In some cases, someone might act out sexually or emotionally in ways that break norms because of internalized shame, trauma, or a desire to subvert societal expectations.