The problem with this thread is there's no way to accurately answer it. Without video or a pic with a gooey mess, there's not much substance to go by.
That said, I could give a little description of a time with a gf. Back then we implied the pull out method (it worked. never got her pregnant). One time she was riding me. I pulled out and shot cum EVVVVERYWHERE. I couldn't count each spurt (couldn't see my dick at the time), but there was cum all over one side of her back, my hand, her leg, my leg, and the bed. It was rather thick, milky, a tad yellowish and quite runny. It definitely reflected a good buildup (hadn't seen her in a few days).
You can sometimes feel when a load is going to be big. You can HEAR it sometimes, too. Kinda makes a PNNNTH!, PNNTH!, PNNTH! sound coming out (or sometimes without the 'p' sound).
Those are the best ones. The trick of course, is being 'built up', being very sensitive, and very hydrated. You can tell which pornstars allow some buildup and who doesn't (Jack Napier, for examle, is the spurting polar opposite of Peter North. His shit doesn't even dribble sometimes. Looks like paste from elementary school). One of these days I'm going to try to get a good 10 to 14 day buildup for a session and see if I can NUKE me a set of tits or something.