Zac Efron learnt the rules of kissing the hard way!

Zac Efron thinks twice before eating a tuna sandwich before shooting an intimate scene. The actor admits he learned the hard way not to indulge in smelly foods beforehand.

The High School Musical heartthrob confessed that once he had tuna sandwich before a kissing scene , so his co-star complained about his bad breath. Zac admits he was mortified by the incident. Therefore, Zac now has learnt to chew a lot of gum before a kissing scene and he definitely stays away from all kinds of smelly food like onions and tuna.

When it comes to stripping off for racy scenes, Zac shared that he uses humour to get past the awkwardness. The 24-year-old actor locks lips with Taylor Schilling in new movie The Lucky One, - the film adaptation of Nicholas Sparks' novel - and the star said he chewed gum before they had to smooch.