The following example show that reflexives and reciprocals can be arguments of a verb taking three arguments: The difference pointed out by the above examples is related to the difference in the categorial status of reflexives on the one hand and reciprocals on the other.
it is usually assumed that ANPs with reflexive meaning are "argument" reducers: when applied to a di-transitive verb phrase they give a transitive verb phrase, and when applied to a transitive verb phrase they give just a VP.