From personal experience, I'd agree that lust requires the ability to string together thoughts. Having meditated for many years -- remaining in the present mome

From personal experience, I'd agree that lust requires the ability to string together thoughts. Having meditated for many years -- remaining in the present moment free of thought, ignoring any thought that comes, letting thoughts fall off as they arise -- lust / arousal are impossible (unless perhaps if one is married and does not need the mind for arousal). Are animals able to carry on a thought process, not sure? Dogs certainly seem to be more in the present than humans. That article links to another interesting one on asexuals.