From leaking out of where? There are too many ways to answer this question without knowing more specifics......
Platelets are cell fragments that prevent blood from leaking through capillaries
cork?
I don't think so? But I heard sperm can prevent wrinkles, or help prevent them.
Adjusting dietary habits and avoiding acidic and spicy foods, alcohol, caffeine, and other bladder irritants can help to prevent urinary leaking.
Ye, they have to be waterproof to prevent the milk from leaking out.
no
tight junctions
Gasket
No. This is a myth.
There are acids present in the vagina which kill the sperm when they enter. Not all sperm are killed but a large number are reduced to prevent them from potentially reaching the egg.
No.
It makes the uterus unfavorable and sperm change