Conversation so far:
Who is Fliess?
his friend Wilhelm Fliess, a Berlin based ear, nose and throat specialist whom he had first met 1887.
What was their relationship?
Freud valued and came to rely on the intellectual and emotional support.
Did they collaborate?
They maintained an extensive correspondence from which Freud drew on Fliess's speculations on infantile sexuality and bisexuality to elaborate and revise his own ideas.

Question: How else did Fliess influence him?
Self-contained rewrite: Other than Fliess influencing Sigmund's ideas about infantile sexuality and bisexuality, how  else did Fliess influence Sigmund Freud?