How does Manuel Puig use imagery in The Kiss of the Spider Woman?

Imagery:

In a sense we’re perfectly free to behave however we choose with respect to one another, am I making myself clear? It’s as if we were on some desert island. An island on which we may have to remain alone together for years. Because, well, outside of this cell we may have our oppressors, yes, but not inside. Here no one oppresses the other. The only thing that seems to disturb me…because I’m exhausted, or conditioned or perverted…is that someone wants to be nice to me, without asking anything back for it.