Pubic lice are usually spread through sexual contact. This is why it is known as a sexually transmitted disease (STD). In rare cases, infestation can be spread through contact with an infested person's bed linens, towels, or clothes.Infection in a young child or teenager may indicate sexual activity or sexual abuse.Animals do not get or spread pubic lice.his is why it is known as a sexually transmitted disease (STD). In rare cases, infestation can be spread through contact with an infested person's bed linens, towels, or clothes. Infection in a young child or teenager may indicate sexual activity or sexual abuse. Animals do not get or spread pubic lice.