Nope. Not a great idea. You need to start slowly. The anus is a muscle that needs to be worked up to having larger objects inserted. Start with finger or a small (I do mean v. small) butt plug and either warm yourself up or have a partner help. To do this, lube up your finger or toy and gently massage the anus. As you feel more aroused and comfortable, work the object inside. Gently move it around to loosen up the area.
21. “I had anal sex with my boyfriend for the first time a month ago. It was my five-year anniversary gift to him and it wasn’t great for me, but I let him keep going because I’m good for my word. When he pulled out after what seemed like a decade, a little poop came out. I was pretty mortified, but my boyfriend made me feel okay about it. I don’t think we’ll be doing it again any time soon, but the experience brought us closer together.” — Lilly, 29
11. “Probably my favorite part of anal is the initial insertion. With a vagina you can find the entry in the dark and it’s usually the easiest thing to slide in there. With her ass.. well, there’s the preparation involved which at a minimum should include lubing it up. It’s an awesome visual for the guy. I’ve had my penis bounce off her asshole when trying to insert it sometimes. It’s fun. I think also since I like having my ass played with, it’s a relatable experience.. I kind of put myself in her place during the act. It’s also really naughty to think of cumming inside her that way and it oozing out. The girls I have done anal with all wanted it at least a second time.”
Intra-rectal pressure builds as the rectum fills with feces, pushing the feces against the walls of the anal canal. Contractions of abdominal and pelvic floor muscles can create intra-abdominal pressure which further increases intra-rectal pressure. The internal anal sphincter (an involuntary muscle) responds to the pressure by relaxing, thus allowing the feces to enter the canal. The rectum shortens as feces are pushed into the anal canal and peristaltic waves push the feces out of the rectum. Relaxation of the internal and external anal sphincters allows the feces to exit from the anus, finally, as the levator ani muscles pull the anus up over the exiting feces.
The abundance of nerve endings in the anal region and rectum can make anal sex pleasurable for men or women.[4][2][5] The internal and external sphincter muscles control the opening and closing of the anus; these muscles, which are sensitive membranes made up of many nerve endings, facilitate pleasure or pain during anal sex.[2][5] The Human Sexuality: An Encyclopedia states that "the inner third of the anal canal is less sensitive to touch than the outer two-thirds, but is more sensitive to pressure" and that "the rectum is a curved tube about eight or nine inches long and has the capacity, like the anus, to expand".[5]

As with other sexual practices, people without sound knowledge about the sexual risks involved are susceptible to STIs. Because of the view that anal sex is not "real sex" and therefore does not result in virginity loss, or pregnancy, teenagers and other young people may consider vaginal intercourse riskier than anal intercourse and believe that a STI can only result from vaginal intercourse.[79][80][81] It may be because of these views that condom use with anal sex is often reported to be low and inconsistent across all groups in various countries.[79]
A Different Type Of Orgasm – Many women have much more intense orgasms from anal sex. I can’t fully explain why this is. I do know that there are thousands or nerve endings in your anus, but there are even more in your vagina and clit. So if you currently struggle to orgasm from regular vaginal sex, then you may find anal sex to be way more pleasurable.
The development of the anus was an important stage in the evolution of multicellular animals. It appears to have happened at least twice, following different paths in protostomes and deuterostomes. This accompanied or facilitated other important evolutionary developments: the bilaterian body plan, the coelom, and metamerism, in which the body was built of repeated "modules" which could later specialize, such as the heads of most arthropods, which are composed of fused, specialized segments.

Spreading STIs. Infections and diseases that are shared during sexual intercourse — such as HIV, gonorrhea, chlamydia, and herpes — can be shared through anal sex. In fact, anal sex is the sexual behavior for transmitting and getting HIV for both men and women. People on the receiving end (or “the bottom”) of anal sex are more likely to become infected with HIV than the inserting partner (or “the top”).
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