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We’re nearly two thirds of the way through NNN! By coincidence, those of you who’ve been faithfully practicing periodic pubic pulsation since this series’s first post have also nearly built two thirds of the all-important foundation from which you’ll tackle more advanced manoeuvres; those who jumped on board later aren’t far behind. (“Pubic puls—eh?” For you, friends, there’s a link to the start of this series at the bottom of this thread.) Exciting as this is, don’t let it distract you from the fundamental habit – all of the sensate training and other exercises in the world won’t do a thing without that steady beat of twenty squeezes done three times a day.

Yet… by now, you probably have enough awareness and control to feel that there’s more happening during a simple PC squeeze than the name suggests. Just what’s going on down there? Glad you asked, because it’s important; time for a brief detour into… Nether-‘Natomy November.

:dealwith_cirno:

All the soft, important bits that’ve been packed between your hips – your pelvic viscera – would soon tumble straight out were it not strapped in by a group of muscles that are together known as your pelvic floor. Each of these muscles do different things, but we’ll focus on two – the pubococcygeus, or PC, and the bulbocavernosus, or BC (more recently known as the bulbospongiosus, but I think you’ll agree that “BS muscle” hasn’t quite the right ring).

(Aside: Given that we share some of our pubic floor structure with other tailed mammalians, it’s very likely that foxgirls, catgirls, and other tailed ladies would use their coccygeus muscles – another part of the pelvic floor – to move their tails from side to side.)

Before we dig into the details behind the PC and BC, go ahead and perform a single squeeze as hard as you can, hold it for a few seconds, and then slowly release. Where was the tension? Which parts of you moved? You probably felt something in one or more of these places:

The space between your tailbone and anus
Either of your anal sphincters (the two rings that close your butthole)
Your perineum (taint)
If you’re a guy, the area just behind your ballsack (and/or a “pulling” or “jump” of your penis shaft)
If you’re a girl, your vagina (and/or a “pulling” or “sucking back” inside it)

Try a few more times, focusing on each of these places in turn, remembering to fully relax between each squeeze.

Your PC (pubococcygeus) muscle sits on the top layer of your pelvic floor, stretching between your tailbone and the bottom halves of those two little “loops” at the front of your pelvis (the inferior pubic rami). In guys, its “front” part forms a little hammock that holds the prostate and is therefore known as the levator prostatae (Latin for – you guessed it – “prostate lifter”; the Harry Potter jokes write themselves) or puboprostaticus muscle. In girls, this same part supports part of the back and side vaginal walls and is therefore known as the pubovaginalis muscle.

It can take a little practice to tell your PC muscle apart from the pubic tangle; a good place to focus is just under your tailbone, behind your anus. When your PC muscle flexes, you’ll be able to feel it pulling against your tailbone there. Since your PC will also pull its colleague muscles in the levator ani complex (which we haven’t time to go into here) up with it, you might also be able to feel your inner anal sphincter move a little. (Vague guidance leads some to mistakenly try exercising their PC by tightening their sphincters directly; take care that you’re feeling that tailbone pull behind your anus that indicates you’re moving your whole PC, not just clenching your rings by mistake!)

Your PC and its levator ani colleagues also sit between your bladder and most of your urethra, which is why you first found it by pretending you were cutting off your pee mid-stream. Next time you pee, try slowly tightening your PC and try to feel with your new level of awareness how and where it cuts off the flow.

(cont. with anatomical diagrams in next post)

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