I've become really interested in cm after trying to conceive for 6 months after a miscarridge. The fertile type is different from other cm in being stretchy. You should be able to pull it between your fingers and it can form a strand of an inch or so. For me it only lasts for about 1 day in a cycle.
I feel really strongly it shouldn't be thought of as yuky. I think it is amazing the body can to that. Seems like a man's idea of a woman.