Jealousy

Once there was an ornithologist named Frank.

Frank had a neighbor called Frank who said:

Birds talk to me, when I go down on my knees.

Frank and Frank were conies, they often went out into the woods and marshlands to look at birds.

Sometimes Frank would get a phone call from his other friend called Frank who'd tell him about a sight of one or another unusual species of birds that he sighted. After a phone call of such sort, Frank would immediately pack his bags and head to where Frank had sighted that bird.

He knew everything about birds but was jealous that birds were talking to his neighbor Frank. 

They didn't talk to Frank.