The rectum shortens as feces are pushed into the anal canal and peristaltic waves push the feces out of the rectum. Cardiovascular system peripheral Artery Vein Lymphatic vessel Heart. Polyps are small growths from the inner lining of the colon. Also use a fresh one if you are swapping between anal and vaginal stimulation. Consult the Sex Guide.
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Anus and prostate
Fibrous joint Cartilaginous joint Synovial joint. Would you like to comment on this page? For penetrative sex, make sure you use a condom and lots of lube — some people feel safer using extra-thick condoms for anal sex. This is the source of the term " anal-retentive " and the derived informal term "anal". The same applies if you are using sex toys. Some causes can be serious, which is why it should be checked out by your doctor.