Don't mistake lust for something more.
Many times when two people meet, there is an almost palpable chemistry between them that anyone else in the room can also feel. This is a sensation that's almost impossible to ignore. It's all completely physical at that moment. You look at each other and all you really want to do is start tearing off your clothes. Lust is a feeling that can hit before you even know each other's names.
Lots of times, these couples just leap into bed or the back seat of a car or the nearest public restroom. They give into the instant gratification and don't bother to say much more than "hello." This is very often a mistake because they're not on the fast track to anything other than a lot of hookups and one night stands. They really don't have anything in common, and they don't wait long enough, nor put in any genuine effort to find that out. Instead, they give in to those physical urges and soon find themselves in a somewhat empty relationship.
If you manage to stay together at least a couple of months, you'll find that the only time you're not fighting is when you're having sex. You may also find that you have sex just to keep from fighting. Having sex may be a way to cure the boredom between the two of you. It then becomes apparent that there's not a lot more to your connection other than a physical one.
You might start to wonder how this can happen. Oddly enough, sometimes it really is just about sex. Hormones can wreak all sorts of havoc with your body and an unexplainable attraction is one of the ways that happens. Sometimes it's all you can do to resist this attraction. So, in many cases, you don't resist. The only thing is, it doesn't take away the lust after just one time.
As to whether or not you should walk away from these situations, it all depends on the type of person you are. If you're capable of an unemotional attachment such as this, by all means go for it. You'll be able to take whatever good things you can from it and then move on. On the other hand, if you're more of an emotional or sensitive type, you might want to stay away from an attachment such as this. Your emotions will get all tangled up with your physical attraction which means that you'll keep getting your feelings hurt as time goes on. Also, you won't understand why there isn't really anything else to the relationship other than sex.
Many times, unfortunately, people that are attached to others will experience these sexual connections. This is difficult because if this happens to you, it will start to confuse you about the relationship that you're already in. The best way to resist the temptation is to acknowledge and understand that you may find yourself attracted to others, and that is absolutely natural and completely fine. However, that doesn't necessarily mean that you're not still in love with your partner.
It's just important to learn how to acknowledge and understand what is happening to you. if you do meet someone that sends an inner flame from your toes to the top of your head. Acknowledging and understanding what is fueling the attraction, and seeing the relationship for what it truly is will help you to move on from it without any mistakes made.