Oakie is 19 weeks old jack spaniel cross. In the evening for the last week this problem started and it goes on for about 10 mins always around 8. Well here goes...... he bites his willy and uses it like a dummy !!!! He hasn't made it sore YET Is this normal behaviour ? I do try to distract him but I think Oakie feels he must do it. Any ideas why he gets the urge to do this and how to stop it