* Doting parent: A parent who is excessively fond of their child and shows it through constant attention and affection.
* Doting lover: A person who is deeply in love and shows it with excessive affection and attention.
* Doting on an idea: To be overly enthusiastic about an idea, even if it's impractical or flawed.
To give you an example, I need to know what kind of "doting" you're interested in. Please tell me:
* Who is doting? A parent, a lover, a friend, etc.?
* On what or who are they doting? A child, a pet, a hobby, a project?
Once I know this, I can give you a clear and relevant example.