But after the smack on the lips, the man took it further, meeting her in a toilet near a condominium pool, where they then had sex.

The problem: She was only 15 at that time, underaged under the law.

Six months later and heavily pregnant, the teen reported full-time national serviceman Muhammad Firdaus Samsudin De Rozario, 23, to the police.

Yesterday, he was sent to jail for four months for having had sex with a girl under the age of 16.

This was Firdaus' second such offence. In 2000, the then 16-year-old had been jailed for three months after admitting to multiple charges of having had sex with an underage girl.

In the latest case, the girl alleged in her police report that she was 15 when she had sex with her 'ex-boyfriend' in the toilet on Dec10, 2006.

When the facts were read to him in court, Firdaus denied being that 'ex-boyfriend', but pleaded guilty.

A district court heard that the girl had gone to the condominium in Choa Chu Kang with her female friend to meet two male friends.

Firdaus, who knew the two men, joined them later.

The group drank beer and started playing a game of 'truth or dare'.

During one round, the girl was dared to kiss Firdaus.

She obligingly did so.

After that, Firdaus walked towards the toilet near the swimming pool.

The girl followed him in and they had sex.

The offence carries a maximum punishment of five years' jail and a $10,000 fine.

ELENA CHONG