So my assumption is that on some level she is describing a scene from a pornographic film ("not a love scene").  By changing the way we view it as an "act between to humans," I think she is casting it more as a description of things people to do one another (specifically men to women), which I think makes a slight change in the way we view the power relationship.  By casting the two as humans, it sets them up as equals, both deserving of dignity.

That attention to dignity I think drives the poem - the tears on her face, but following the male's request not to show his face.  This request, and the fact that it is followed, really makes the piece interesting to me. Is she saying the male is in some way ashamed of this act?  Does on some level he realize this is inhumane treatment?  If he knows this, why does he still want to do the scene?

This male conflict is what brought me back to the poem.  There is in many ways the notion that we cannot be fully human if we are treating other people inhumanely.  In this sense, issues surrounding pornography and sex and dignity and power become incredible charged and very personal.  In what ways do some men's choice of pornography and/or sexual habits render them as hypocrites?