I am told that the ejaculate has soeme curisous physical properties, as a consequence of the polysacchirides it contains. It's the reverse of non-drip paint (for which the term is "thixotropic"), in that it thickens when it is agitated. It shares this characteristic with the fluid the body uses to lubricate the skeletal joints. I don't know if this is true, I have been somewhat distracted when I might have had the opportunity to observe this behaviour.