Yes, the sentence is grammatically correct. It means that the speaker occasionally thinks about whether they would look more attractive if they didn’t have a gap between their front teeth (known as a diastema).
Here are a few possible rephrasings:
1. "Sometimes, I think I might look better if I didn’t have my gap-toothed smile."
2. "I occasionally wonder if I would be more attractive without my gap between my teeth."
3. "Sometimes, I wonder


