Others are thought to be partial survival of other behaviors, which are believed to have been a part of our evolutionary past.
इतर आचरणांचे आंशिक अस्तित्व असल्याचे समजले जाते, जे आपल्या उत्क्रांतिक भूतकाळाचा एक भाग असल्याचे मानले जाते.