There are a lot of cheating threads lately. I'm sure that the majority of relationships only face cheating if the other one is unhappy in the relationship. Still, from a man who is in a very solid relationship, everyone may be a bit "nervous". So, ladies, what makes you cheat? For a guy - I believe a guy purely would do it if he was never committed wholely to the relationship. These signs can be early on by how he acts, especially if he's glancing at other women a lot. Knowing if he is too comfortable with another woman is a big indicator, and if less time is being spent with you. In short, a guy will cheat because he's looking for steady "ass" from his relationship.