Spanking, a consensual sexual act between adults, involves the striking of the buttocks with hand and various implements for the purpose of sexual play, bdsm dynamics or consensually-agreed correction. Though the severity, positioning, implements used and reasons may vary based on the dynamic, ultimately a spanking is defined as whatever both party's agree to accept. Positions include Over The Knee (OTK), bent over a couch/other rounded surface, or laying flat on a surface with your bottom facing upwards.