This is based on what I have observed.
Girls are not commitment-phobic, per se. They just have impossible standards that most guys cannot meet. If you are that guy, they will be itching on your jock to "commit." Thus, they are really having fun until they meet that dude who they think they can fit into their ideal. This has more to do with the phenomenon where ugly-to-cute girls think they deserve the best, even though they don't.
Example. You are a handsome guy, charming and attract a lot of girls. You can bet she's going to try to nail you down.
Girls are not commitment-phobic, per se. They just have impossible standards that most guys cannot meet. If you are that guy, they will be itching on your jock to "commit." Thus, they are really having fun until they meet that dude who they think they can fit into their ideal. This has more to do with the phenomenon where ugly-to-cute girls think they deserve the best, even though they don't.
Example. You are a handsome guy, charming and attract a lot of girls. You can bet she's going to try to nail you down.