It means that you are doing a great job and you should not stop now! :-)'
It means he's extremely excited. A man can be horny without having any precum but when he's very very excited, his penis releases a bit of *** before hand. Also, the longer he has to wait while in this high level of excitement, the more precum is produced.
It means his post *** will *** soon
I was hoping to find an answer, as I usually have lol ;-)