When I had one stuck once it was a mixture of the two above.
I wrapped a bag of frozen peas around the joint for about ten minutes, then I poured boiling water just over the female section. Came apart easily.
Sometimes, whilst two people are pulling both ends, tapping the joint with a knife handle will loosen it. Tap lightly but rapidly causing vibrations whilst playing the Beach Boys "Good Vibrations"
The music won't help release the joint, but it's a good piece anyway. /forum/smilies/smile_smiley.gif<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" width="425" height="350"><param name="src" value="http://www.youtube.com/v/dEGmd-3Gg-s" /><param name="width" value="425" /><param name="height" value="350" /><embed type="application/x-shockwave-flash" src="http://www.youtube.com/v/dEGmd-3Gg-s" width="425" height="350"></embed></object>
Gosh takes me back that.