Original: Common reasons for practicing sexual abstinence include : religious or philosophical reasons material reasons ( to prevent conception - undesired pregnancy - or sexually transmitted disease transmission ) ; psycho-sociological reasons ( e.g. , clinical depression , social anxiety disorder , increasing testosterone in males , or negative past experiences ) ; or , legal injunctions requiring conformity .
Simplified: Common reasons to deliberately abstain from the physical expression of sexual desire include religious or philosophical reasons ( e.g. chastity ) , material reasons ( to prevent conception ( undesired pregnancy ) or Sexually Transmitted Disease transmission ) , or to conform to legal regulations .