Yes. Kinda. The definition of “too much” is not a number but is a list of problematic behaviors associated with excessive masturbation. It’s actually been defined by respected a medical manual (The Merck Manual). In a nutshell, masturbating itself is healthy and natural. However, the following behaviors define a problem with self-pleasure:

• Masturbating in public

• Focusing so much on self-pleasure that it interferes with other forms of intimacy 

• If it’s done so much that it causes distress