Could a cheater be born a cheater?

That's what new research is claiming...saying a man's tendency to be unfaithful may be influenced by his genes.

One man, Henry Spicer, says "I think if you was raised by a person who had more than one boyfriend or girlfriend. I think that's the way you gonna grow cuz that's all you know."

The study published in the journal Proceedings of the National Academy of Science, claims that a certain genetic make-up could affect an important attachment hormone which prevents a man from establishing strong relationships and getting married...or could make them less likely to be monogamous.

Another man is skeptical. "I don't buy that it's in our genes. That we're born that way. I'm sorry I don't believe it," said Ken Davis.

Dr. Phillip Muskin says this so called "cheating gene" could make a man more vulnerable to be unfaithful...but it doesn't necessarily mean he is unable to maintain a monogamous relationship.

Psychiatrist Phillip Muskin says, "I think the bottom line of this study there are genetic vulnerabilities that we all inherit. We can be ruled by them or we can be in charge of them. And the choices are always ours."