Husband and wife agreed that whenever they want to have sex, they will call it phone calls so that the kids will not decode it.
One day the husband send his son to go and tell his mum that he want to make a phone call.
Mum replies; tell your daddy that network is very busy today.
Husband replies; tell your mummy that if network is busy at home, i will goto public phonebook.
Mum replies; tell your daddy that if he dares try it i will open a BUSINESS CENTER.