One night stand or relationship without continuation
One night stand is not a suitable option for everyone. In addition, such a hasty intimacy reduces your importance in the eyes of your partner.
It should be noted that there are many nuances in this matter, not to mention basic hygiene and diseases. Consider the pros and cons of no-binding sex. There are not so many advantages. First, you don't have to meet the girl's parents. Second, if your partner understands that you have a one-time sex, then she is much more willing to be liberated and realizes all her wildest fantasies. After intimacy, you can safely send the girl in a taxi without promising her breakfast in bed.
As for the disadvantages of such sex, then it may completely lack a sensual component. Most importantly, remember about condoms. After intimacy, you may have the feeling that this is the one that you have been looking for all your life. In addition, life can push you again, and, as often happens, at the most inopportune moment.