In 2010, Mira Bellwether wrote “Fucking Trans Women,” the first piece of its kind that outlined the sex lives of trans women as an educational and instructional piece of text. In the zine, Bellwether discusses “muffing,” a term that describes the act of pushing the testicle back inside of a male-bodied person’s inguinal canal or penetrating the inguinal canals with another object or finger. Before “Fucking Trans Women,” there was no term for “muffing” – her zine was and is literally revolutionary. Bellwether expands on several sexual practices, but muffing is so unique and interesting because it is an act that involves penetrating an orifice that most people, even people with a penis, don’t know exists.

For those of you thinking, “Wait what?! There are holes above testicles?” Think of it like this: it’s the place where balls go when you jump into a cold lake. While we can’t see the area with the naked eye, they are located above and behind the scrotum and testicles and covered by flesh.

Whether this is something you think you might be into – or you’re just curious about how the heck it works – here are some key things to know about muffing.

How to Locate and Penetrate the Inguinal Canals

The easiest way to penetrate your inguinal canals is to first figure out where in the hell they are. If you take your hands, move a testicle to the side, and move your hands in an upwards motion behind the penis, you can find two soft and small entrances. The size of these entrances can stretch but it’s important to move slowly.

For many people, this can be challenging at first for several reasons. Locating the canals can take some practice and penetrating can be painful and unfamiliar in the beginning. There is an exterior area of the canal and an interior area which is deeper inside of the body. When fingering the inguinal canals, someone inserts a finger into the superficial, or exterior area, and the genitals feel a sensation. If the finger could continue, which it can’t because of the layer of skin, it would continue to the interior canal which goes to the intra-abdominal area.

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Similar to anal sex, fingering the inguinal canals is best when done slowly and carefully.

Muffing for Beginners: Tips!

The inguinal canals don’t require lubrication and do not secrete any lubrication which makes muffing and easy and clean process. Here’s how to do it: