Most of the time, no. A male partner will not feel an IUD during sex. The device itself sits inside the uterus, well beyond reach. What a partner might occasionally feel are the thin plastic strings that extend from the IUD through the cervix, with only about 1 to 2 inches hanging into the top of the vaginal canal. Even then, it’s uncommon and typically described as a mild poke rather than anything painful.
What Partners Actually Feel
The IUD is a small, T-shaped piece of plastic placed inside the uterus. No penis can reach it there. The only part that extends outside the uterus is a set of thin plastic threads, similar in texture to fishing line, that your healthcare provider uses to eventually remove the device. These strings pass through the cervix and rest at the very top of the vagina.
When partners do notice something, they typically describe feeling a light prick or tickle from the string ends against the tip of the penis during deep penetration. In one clinical study, about 9% of users reported that their male partner could feel the strings. A separate study looking at a specific IUD design found that 18.2% of partners noticed the strings and were bothered by them. So while it happens, it’s far from universal, and the sensation is almost always minor discomfort rather than actual pain.
Why It Gets Better Over Time
Freshly trimmed IUD strings are stiffer and have blunt-cut ends, which makes them more noticeable in the first few weeks. Over the course of a few months, the strings soften considerably and tend to curl around the cervix, tucking themselves out of the way. Many couples who notice the strings early on find the sensation disappears entirely after this softening period.
Certain sexual positions also affect whether the strings are noticeable. Positions that allow deeper penetration bring the tip of the penis closer to the cervix, making contact with the strings more likely. Switching to shallower angles can reduce or eliminate the sensation while the strings are still new.
When Feeling Something Is a Warning Sign
There’s an important distinction between feeling a soft string and feeling something hard. If a partner feels a firm, plastic object during sex, that’s not the strings. That’s the body of the IUD itself, and it likely means the device has shifted out of its correct position.
A displaced IUD is uncommon but worth taking seriously. When the hard plastic base is poking through the cervix, the device is no longer providing reliable contraception. In rare cases, a displaced IUD can also cause complications: it may cut into the uterine wall, cause internal bleeding, or migrate into the abdominal cavity where it can trigger inflammatory reactions or bowel problems. If either partner feels hard plastic rather than a thin string, that’s a reason to stop and contact a healthcare provider.
Other signs of displacement include suddenly being able to feel the plastic base with your fingers during a string check, strings that seem noticeably longer or shorter than usual, or strings that have disappeared entirely.
What Can Be Done About Bothersome Strings
If the strings are consistently bothering a partner and the softening period hasn’t helped, a provider can trim them shorter. Standard practice is to cut IUD strings to about 3 to 4 centimeters after insertion, but there’s some flexibility to go shorter if the length is causing problems. There’s a trade-off here: strings cut very short can sometimes become more poky because they don’t have enough length to curl and lay flat. A provider can advise on the best length based on individual anatomy.
It’s also worth noting that the cervix shifts position throughout the menstrual cycle, sitting lower at some points and higher at others. This means the strings may be more noticeable during certain times of the month and less so at others. If the sensation is intermittent, this natural movement is likely the explanation.
A follow-up visit is typically scheduled 4 to 6 weeks after IUD insertion to check that the strings are in the right position and the device hasn’t moved. This appointment is a good time to bring up any concerns about a partner feeling the strings, since the provider can check placement and adjust string length in the same visit.