At first glance, BDSM (bondage, discipline, sadism, and masochism) may seem like an abusive practice carried out only between heartless, psychologically disturbed sadists and victims with low self-worth. Appearances, however, are often misleading, and with BDSM, this misunderstanding is especially profound, as is obvious in the new movie release, “Fifty Shades Darker,” an erotic romance film.…

To practice bondage, you need some kind of physical restraint so that you can dominate or be dominated by your partner. Of course, there are many different types of restraints to choose from—you’re really limited only by your own imagination—but perhaps the most classic bondage fetish of all is rope bondage. Rope play is one…