I find it rather weird that the reflexive pronouns me, te, se etc. are included the passé composé form of reflexive verbs.
Example:
- Qu'est-ce qui s'est passé?
- Je me suis lavé
- Nous nous sommes habillés.
What I don't understand is how exactly the reflexive pronouns in the sentences above help to clarify the past because we wouldn't have used être if the receiver of the action were someone else, so I'm really confused how this works. It seems to me that être is taking these pronouns as indirect object pronouns.