My rule of dating is that if they give you an uncomfortable feeling at the pit of your stomach, then you shouldn't date them. Nor if you feel like you're forced to be with that person, kind of like being dragged on a dog collar to be with them, then you shouldn't try to hang out with them, or even chase the idea of dating them.
Some guys that fit in this category, at least the ones that I've experienced, are the type of guys who won't listen to the word no. That's not okay. They are extremely horny with their hormones raging as their tempers when you turn them down. I wonder if their rage comes from the fact their sexual desire is so high on the hierachy of needs, that when the need is not getting met, aggression occurs. And of course, turning them into complete and total jerks.
I've dated a few of these guys my freshman and sophomore years of high school. These relationships, if you can call them that, never made it past the week mark. The first one was when I was a freshman in high school. Although I am not going to mention names because that's pretty much tacky, he basically overwelmed and smothered me. During our three day relationship (or two and a half day) he basically talked to me pretty much during all hours that I wasn't sleeping, wanted to push my boundaries, and I think mostly cared about doing the dirty deed, or different divisors of the dirty deed. The second time, because you know how you can't learn the first time, was when I was a sophomore in high school. He was three years older than me (I was almost 16 at the time, he was 19). In the span of a day within talking he asked me to be his girlfriend. Feeling a bit of crazy and a bit of why the hell not, I decied to say yes. He went 100 mph, I wanted to 10. He basically was cuddling and touching me in ways I don't feel comfortable. Less than a day he asked me out, I said hasta la vista baby.
Yes, I made a few dating mistakes in my younger days. But give me a break! I was a child. But those stupid mistakes actually taught me something. They taught me that you have to date someone that respects your boundaries and doesn't force you into anything. You have to be able to respect their space and boundaries too, making it 50-50. He can't be the dominant one, and you shouldn't for that matter either. The big thing that I learned here? You shouldn't date someone just for a notch in your belt. You date people because you like them and want to get to know them and build a long and lasting relationship with them.
In conclusion, we can say that as we go through life we are going to encounter one or two of these kinds of guys. The take home message here? If they give you an uncomfortable feeling at the bottom of your stomach, do yourself a favor. Run.