There is this white discharge that comes out sometimes when i engage in sex, i think it sperm but my partner doesn't? what could it be? is it normal?

Could be normal ...: As during sex/sexual arousement, women will produce vaginal secretions/fluid to help with lubrication to facilitate intercourse. These secretions tend to be watery/mucoid without any signfiicant odor or associated with pain, spotting. If you are noticing odor, discolored secretions, pain/spotting, this should prompt further evaluation with your doctor.