A sweet tooth is a strong love of sugary things. Have a sweet tooth, a terrible sweet tooth, no sweet tooth at all.
It always takes have, and the tooth stays singular however many puddings are involved. It is affectionate and nobody uses it as a criticism.
1phrasesweet toothA strong love of sugary treats.
“She has a sweet tooth and a drawer to prove it.”
sweet tooth is a phrase.
Practised in Idioms