Remember that there's a difference between sleeping with someone on the first date and a one-night stand.
According to our expert, sleeping with someone on a first date is "believing that there could be a second date, a relationship afterwards."
The second implies "no-strings sex, which means being open and honest with the other person, as well as with yourself."
There's no right or wrong answer, you need to judge the situation and take responsibility for yourself.
Statistics
According to a 2003 Durex survey, 45% of us have had a one-night stand.