nowaday ppl is kinda addicted to sex and they could be referred as sex maniac??so one night stand is probably normal for them to perform and if they really think about the consequences of having one night stand which makes them vulnerable to the STD then they won't do it..for most of the people who are addicted to sex would not care about it..what they care is the moment right now which is having fun just as the buddhist always say ' live in the present without looking back and worrying about the future'