2 years later i am always reminded of sex every time i do bendover leg stretches. there is that anticipatory tension in the hamstrings of the coming stretch: it will burn, that is known, i still am not keeping those muscles completely relaxed through the stretch. the flinching tension & the wanting not to do it are overriden by the master, whoever that is, the one with the mask & whip, the "me." so there is the triumph of engagement. once through the "gate" the muscle goes with the flow and responds appropriately in accord with its instincts & training, driven through "pain" to pleasure.
other muscles, smaller, more in front, better known, they are easier, they just open up, "i" walk right in.
so i wanted to breath in on extension & out on flexion, so the moment of going past the barrier, where the indrawn gasp might occur if too abrupt an entry or too much anticipatory tension or too much rush of pleasure, is that an extension or a flexion? an awase moment, the two moving parts breathing together, expiring through the crisis of contact into the next thing. extasy.