Grammar fix
sweet tooth
a love of sweet food
a strong liking for sweet things like puddings, cakes and sweets
expressionB1common
Hear it in context
Notice where the phrase sounds natural.
I've got such a sweet tooth — I can never say no to dessert.
He hasn't got a sweet tooth, so get him something savoury.
Fix the pattern
One small grammar move makes it sound right.
Saying 'sweet teeth' — it stays singular even though it's about a habit.