Sharing is not always caring.

So you meet someone, you go on a few dates.  Wow, you really like this person.  You can see this becoming something bigger.  Do you stop dating anyone else?

If you really feel a connection with someone, you want to give it a real chance to develop.  Without any distractions.  That is, if you want and are looking for a real relationship.  But I'm guessing, if you like to sleep around, you're probably not looking for the one.  You probably aren't looking past the intimacy.   You're addicted to the chase and conquer of each female.

I've never understood how people can sleep around and seriously date multiple people at the same time.  How are you ever able to evaluate how you feel about anyone if you are dating/sleeping with multiple people?  

And the guys/girls that make is so obvious, ugh.  So gross.  Really, you think I'm gonna think that's it hot?  Knowing that you were hanging out with another girl last night, then hanging out with me the next.  ...not a good look.  Little things like that turn me off.

If you are feeling someone, you're feeling it.  Give it chance.  Stop acting like a douchebag.  If you're only looking for relations and not a relationship, say it.  No reason to put on an act.