Bondage... Playing with rope...
Bondage does not imply sadomasochism. Bondage may be used as an end
into itself, as in the case of rope bondage and breast bondage. It may also
be used as a part of sex or in conjunction with other BDSM activities. The
letter "B" in the acronym "BDSM" comes from the word "bondage".
Sexuality and erotica are an important aspect in bondage, but are often
not the end in itself. Aesthetics also plays an important role in bondage.
A common reason for the active partner to tie up their partner is so both
may gain pleasure from the restrained partner's submission and the
feeling of the temporary transfer of control and power. For
sadomasochistic people, bondage is often used as a means to an end, where
the restrained partner is more accessible to other sadomasochistic
behaviour. However, bondage can also be used for its own sake. The active
partner can derive visual pleasure from seeing their partner tied up, and
the restrained partner can derive tactile pleasure from the feeling of
helplessness and immobility.
Fun fact! Rope can be used for other things as well!