Raditz was just enjoying some peace and quiet of his own bed room.
He was in the middlw of the daily grooming, sitting on his bed, brush in hand and only wearing his boxers. The saiyan gently brushed his tremendously long hair, treating it with utmost respect while his blue bird was working on the hair at the top of his head where she have been using as a nest.
The hair brushing wasn't a very fun task though, so he was keeping himself entertained humming those songs that he would hear on the street from time to time. Heh, he was glad noneof his comrades were around at the moment or his impression of a cool, badass leader would have been ruined.