Wiz Khalifa has stopped smoking marijuana at home for his unborn baby because the habit "irritates" girlfriend Amber Rose.

The 25-year-old rapper - who was arrested twice this year for possession of the herbal high - has agreed to indulge his habit away from his lover Amber Rose because it "irritates" her.

He said: "I smoke outside instead of inside. Everything is all about smells, man. If the smell irritates her, then it gotta go."

Wiz - whose real name is Cameron Jibril Thomaz - also admitted he and the model know the gender of their unborn baby but don't want to tell anyone yet.

He told MTV News: "I do know, but then [Amber] told us not to say yet. We'll wait until she's ready."

And the couple are finding choosing a baby name "difficult" - but Wiz expects Amber will have the final say in the moniker.

He said: "We're working on it. You know how difficult that is.

"But it's all good, though. I let her have her way all the time; that's my baby."