Do spirit attachments benefit from their host’s sexual energy being expressed, and is this a reason they attempt to cause perverse sexual behavior in their host?

They do benefit from the energy because they benefit from all human energy, but they do desire to pervert things as this will fine-tune the energy to be a greater match to them and has other benefits in causing a downgrading of the person’s experience and can often cause problems and get the host into trouble to further drag them down. This they see as a win for their side, so to speak. So there can be multiple motives and agendas for this, but the corruption of a person to pervert their sexuality is just one of the many tricks they play to misdirect human endeavors, to make them corrupt and serve a dark purpose.