Can sperms in precome pass through jeans and boxers or other strong fabrics?

Precum: Pre-ejaculate or precum is a clear, colorless viscous fluid that comes from special glands in the penis called Cowper's glands. Precum occurs before ejaculation so there is no to few sperm in it. The amount of fluid is small and contains little sperm and it is unlikely that there would be enough to soak through your jeans or boxers or other fabric.