I've had conflicting advice: one school of thought is that the problem is grit and general crud jammed in the joint, locking it.
The other is that the surfaces are so clean and smooth that you've got, in parts, at least, an all too perfect fit, and you're trying to create a vacuum when you pull them apart. They'd advocate scratching the male joint lightly with sandpaper to prevent this, rather than polishing the joint .
A third says that no matter which is right, a couple of streaks - lengthwise - of candle-wax down the male joint will create a yielding bit of clearance and prevent it happening again. I leant towards the third, but watch out for grit sticking to the wax. Give the male a dust-off with a cloth (rod-bag) before assembling, just in case.
