According to a new study exploring the dos and don'ts of dating, you shouldn't lock lips until the second date or connect on Facebook until at least the third.

Appearing on Britain's Got Talent last night, the 17-year-old appeared to be emulating Britney Spears and Madonna's famous kiss when she pretended to lock lips with a female dancer.

Marius, since that time, had not gone further than to touch Cosette's hand, or her kerchief, or a lock of her hair, with his lips.