Yes, my precum is a sign that everything on me is aroused, ready to go, at the boiling point. That is when I am sometimes very careful, maybe to hold back a bit, as it doesn't take much longer until I am shooting. When small drops would form at the tip of my cock, my ex gf used to lick me there, then that kind of cock teasing would make me produce more... she would keep me on the edge like that sometimes... normally it isn't seen when all of our juices are mixing down below. But it is a hot thing to share sometimes as part of foreplay.