Absolutely. Don’t overestimate dudes. A guy can be jealous of a golden retriever if the pooch has a good jawline and strong calves. In terms of flat out rejecting her because of it – that depends. If, for example, he is jealous of a physical attribute of hers – athletic body, great skin or teeth, he might be open about it. Or he might tease her about it because he’s insecure. Or he may just enjoy knowing he is capable of dating someone he physically admires.
It gets trickier when the jealousy is more in the realm of style or success or talents. In these instances it is pretty common for a partner to reject the other. Why? Because they feel inadequate, challenged and less than. For example, if a girl is the lead singer of a rock band about to get signed to a label and has sold a few pieces of artwork at a hot sh*t gallery and just authored a book and studies medicine in her downtime while her man is an unemployed grocer – yes, he might dump her based on feelings of jealousy. He might dump her because he feels she is indisputably better than him. Even more “man” than he. In short: the dumper (male or female), tries to escape their pain and shame by casting the partner off. It is the only thing they can control. Get it?