Semen will disperse in the water
Lisa
Really? I've never noticed that. Have you ever been fooling around in the shower with your man and then tried to wash semen off your skin wherever it landed? That stuff turns to rubber cement within seconds in my experience!!!! Sometimes even after getting out and drying myself I've found that it's left a layer of 'glue' where I've not scrubbed it off hard enough!

From my own observations, EWCM has a much finer consistency (like artificial lube...or funny enough, egg white!) but semen will be more clumpy and globby and if in doubt, it has its characteristic smell whereas EWCM to me doesn't smell of anything at all.