Man, 24, and girl, 15
Chee Wei Tong, 24, was sent to jail for 30 months on April 8 for having underage sex with a 15-year-old girl.
The former customer service officer had sex multiple times at his flat and at an HDB staircase landing in August 2012.
He had met the girl on a dating website and convinced her to have sex with him. The girl was a virgin.
Man, 24, and girl, 13
A Singapore Civil Defence Force deserter was jailed a year on April 22 for underage sex and desertion.
Khairul Juperi, 24, who is married with two children, had sex with a 13-year-old girl last November.
The sexual encounter was uncovered when police found the girl who was a runaway.
Man, 30, and girl, 14
Eugene Prem Kumar, 30, was a delivery driver when he had underage sex with a student shortly after getting to know her on Facebook in Sept 2010.
Last month, he was jailed 24 months after admitting to having sex with the 14-year-old at his flat.
He had asked her to be his girlfriend and initiated sex. She later told a social worker at Gracehaven Home.
Kumar is married with a daughter.
Man, 38, and girl, 17
A construction worker became the 24th man to be jailed last month for engaging in commercial sex with a 17-year-old girl from China, who was forced into prostitution by her pimp.
Li Zhiguang, 38, admitted to paying $60 for her sexual services at a hotel in Geylang in May 2013.