The white thing that comes out of a girl is likely vaginal discharge, which is a normal occurrence that all women experience. Vaginal discharge is a clear or whitish fluid that comes out of the vagina and is mainly made up of cells and bacteria. It helps clean and lubricate the vagina and helps fight off bad bacteria and infection. Normal vaginal discharge should be clear or white, and its thickness may change throughout the menstrual cycle. However, changes in the amount, consistency, color, or smell of vaginal discharge could indicate an infection or other problem. If a girl notices a change in odor, especially an unpleasant odor, or a change in color, especially greenish, grayish, or anything looking like pus, she should contact her healthcare provider. It is important to note that white discharge during sex is healthy and normal, and it is the bodys natural response to pleasure that helps with lubrication. However, if a girl notices white vaginal discharge after sexual intercourse, it could indicate an infection such as bacterial vaginosis.