When a woman has unprotected sex with 5 or more men in a 4 hour period, she develops a seminal wall inside her vaginal cavity. This wall is nearly impenetrable and can only be breached by passing urine or douching.
Baby Carlos: Damn! that girl was "breaking the seal" all over everyone last night.
Adult Carlos: Grossss! i know. I heard some girls got pregnant from it, hope they got 500 bucks or a coat hanger.