Sex scenes in porn videos during the seventies were accompanied with what was considered to be cheesy music, even by seventies standards. The music was generically the same, sounding much like "bow chicka bow wow".
As a result, the phrase "bow chicka bow wow" came into usage to reference something sexual, whether explicit or implied.
So, Rob, are you two going to go back to your place? Bow chicka bow wow.
originally, something males said to alert each other of an attractivefemale. now it is more commonly used to simply make a phrase sexual. also used as a euphemism for sexual activities.
When lusting in the heat of the moment an alarming "Bow-Chicka-Bow-wow" will appear out of the blue..do not be alarmed it helps to "enlighten" the mood...can ya dig it?