I am surprised no one has answered this for you....
I have never tried it... so I cannot say... I have never left males after they were sexed and I have never had one show sex (or grow balls) until after put into flower (12/12)..... if you are getting balls before they are put to flower I would guess they are either auto flowering (like low rider is) or they have been majorly stressed. When normal flowering occurs they are not supposed to bust open until they are fully developed and this can be just a matter of days after development. So if they are developing now in preflowering (vegetative) status, then I would expect they could pop open and do what they are supposed to do....