Some people like it! For some people, the idea that someone wants them so much that they'd do something wild like kidnap them makes them feel very sexy and desirable? It's especially good for people who have low self-esteem and struggle to believe that other people want them.

There's also the kind of person who is really bad at taking any time off for themselves. Like they couldn't possibly take a week off and do nothing but have sex, they have work to do - oh, but if they're kidnapped, then they don't have a choice about it, and so they can enjoy it without feeling guilty.

Those are the two big reasons, I think.