Ich dusche mich jeden Morgen.
English: I shower (myself) every morning.
Reflexive verbs in German are verbs that use a reflexive pronoun (like 'myself', 'yourself' in English). The action comes back to the subject. In German, these verbs are used with 'sich' and its forms.
Use reflexive verbs in German when the subject does something to itself, for daily routines, feelings, or when the verb always needs a reflexive pronoun.
Ich dusche mich jeden Morgen.
English: I shower (myself) every morning.
Er freut sich auf den Urlaub.
English: He is looking forward to the vacation.
Wir treffen uns um acht Uhr.
English: We meet (each other) at eight o'clock.
Setzt euch bitte!
English: Please sit down!
Sie interessiert sich für Musik.
English: She is interested in music.