Chemotherapy is a cancer treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping the cells from dividing. When chemotherapy is taken by mouth or injected into a vein or muscle, the drugs enter the bloodstream and can reach cancer cells throughout the body (systemic chemotherapy). When chemotherapy is placed directly into the cerebrospinal fluid, an organ, or a body cavity such as the abdomen, the drugs mainly affect cancer cells in those areas (regional chemotherapy). The way the chemotherapy is given depends on the type and stage of the cancer being treated.
Anal sex is a type of sexual intimacy that people have always explored, but advice about how to do it and how to enjoy it are often lacking — especially when compared to advice about vaginal sex and oral sex. So BuzzFeed Health spoke with the following sex educators and sex therapists for the comprehensive anal sex education that was probably missing from your life:

Since STDs can still be spread through both anal and oral sex, it is a good idea to use physical protection such as a condom to protect both yourself and your partner. Since the skin of the anus and rectum is thin, prone to tears, and not well lubricated, it may also be a good idea to use a water-based lubricant to protect these delicate regions from tissue damage. A lubricant cannot, however, completely prevent tearing or injury. With oral sex, no lubricant is suggested because most brands are not safe to ingest.

Silicone Based Lube – Silicone based lube is the lube we recommend you use when having anal sex. It’s compatible with latex condoms, so you won’t degrade them. It also lasts much longer than water-based lube, so you don’t have to worry about reapplying it either. It also feels super silky and smoother than many water-based lubricants. The only slight drawback is that it can sometimes be a little hard to wash out of your bedclothes.
First, a few words about the survey. We shared this 15-question anonymous survey with our social media followers, on our website and in our newsletters—to reach a convenience sample of people connected to San Francisco AIDS Foundation. The 412 people who took the survey likely felt they had something to say about pain and sex. (In other words, the sample isn’t representative of our entire community or San Francisco.)
The anal sphincter acts as a bit of a gatekeeper for the rectum. For anal sex, however, it’s important that this muscle relaxes. Not only does it make the experience more pleasurable, it reduces the risk of tearing or discomfort. Relaxation involves patience, both at the time you’re attempting penetration, and as you become more accustomed to anal sex.
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