My opinion...Girls found that interesting may be because it's weird.
Anyway you don't have to be open unless you find a girl who deserve it (i mean you like her and she likes you), then you can open your heart safely...because if you decided to change your way you'll be hurt because your value (i thought so) differ than other way of living (i mean to be open).
Act as yourself, As it should be nothing else.
Regards.