Evidence is not clear, but it is possible that<unk>  before anal sex can increase the risk of transferring HIV, and other diseases. There is evidence that<unk>  sometimes can disrupt the epithelium, or tissue in the rectum, and if this tissue is damaged, then diseases can spread more easily.<unk>  before anal sex increases the risk of transfer of Hepatitis B. There are reports that activities which can have the side effect of causing unintentional forcing of water into the rectum, such as waterskiing, may cause discomfort but can potentially bring other harms.
Rectal douching
Rectal discharge
Fecal vomiting
Punctal plug
Nipple discharge
Open defecation
Defecation
Blood in stool