Interesting.
If you don't mind some suggestions, lust is about greed and adrenaline. To simulate that desire it has to drive, become faster, progress. To help this, maybe a rapid, yet faint, shaker (more rapid then the one you have) in the background. Then you could filter some breathing as I've seen many artist do before.
The bongos are in the right place, and should keep that steady tempo, but perhaps they could be a little more ghostly and tantalizing, which could use some reverb or such.
I enjoyed the pacing, though, and the melodies are very interesting and mesh greatly. With some work this could be quite a culmination, something I wouldn't mind on a long drive or an art session.
With all this, I think it finally needs a climax (suggestive of the subject) to disorient and push it into the next section. I'll look out for this in the future!