From what I know, most Singaporeans are sexually shy. You won't hear a bunch of stories about how some dude banged another chick and stuff like that. However, in my opinion, sex isn't wrong. As long as you're not hurting anyone or their feelings, then it's all good. Condoms or no condoms, it's completely up to you. Just be responsible for the stuff that you do, and don't offend anyone.
I feel that we shouldn't shun someone for being sexually active. Is pornography really that bad? I hear that it's bad because it raises the viewer's expectations during real sex, because many people think that porn sex is real sex. But hey, that's another debate for another time. Still, I know of many people who enjoy viewing pornography and yet lead happy, healthy lives. This is actually pretty possible, believe it or not. Recently, I stumbled across a post on tumblr. It was a comic comparing sex and car accidents. "We shouldn't teach teens about condoms because that'll encourage them to have sex" is like saying "We shouldn't teach people about airbags because that'll encourage them to crash into things." Which I thought was very true and accurate.
Sex is fine. Be safe, don't tell the people who get offended easily, and don't shun someone for being normal.