In Peppa Pig, adults don't want to listen to Grandpa Rabbit sing, mainly for the following reasons:
Grandpa Rabbit's singing voice is more unpleasant. In the animation, Grandpa Rabbit often sings some old songs, and his singing voice is sharp and harsh, which makes people feel very uncomfortable to listen to.
Grandpa Rabbit often digresses when he sings. Grandpa Rabbit's memory is not very good, and when he sings, he often goes off topic and talks about things that have nothing to do with the song. This makes the adults feel very irritated.
Grandpa Rabbit often drags mud and water when he sings. **Grandpa Rabbit doesn't have a very good sense of rhythm when he sings, and he often drags mud and water, which makes people very uncomfortable to listen to.
Specifically, in the anime, there are several clips that show that adults don't want to hear Grandpa Bunny sing:
In the fourth season, episode 15, "Grandpa Rabbit's Ship Repair Yard", Grandpa Rabbit sings in the ship repair yard, and both Grandpa Pig and Paige feel happy. However, Mother Pig and George felt that Grandpa Rabbit's singing voice was too ugly and didn't want to listen to it.
In Season 5, Episode 12, "Go to the Beach", Grandpa Bunny sings at the beach, and both Peppa Pig and George find it funny. However, Mother Pig and Father Pig felt that Grandpa Rabbit's singing was too muddy and didn't want to listen to it.
Of course, there are also adults who like to listen to Grandpa Rabbit sing. For example, in Season 5, Episode 13, "Grandpa Bunny's Birthday", Grandpa Bunny sings at the birthday party, and Grandpa Pig, Peppa Pig, and George are all happy. However, this is relatively rare.
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