I've had many experiences, I'll share three.
Three years ago, I was with Danni Daniels
. First I sucked her dick, then her balls, then she jerked off until she shot a load on her stomach and chest.
Five years ago, I was with Brownie/Nia Lee/Neon. I sucked her dick, then watched her jerk off until she came on her stomach.
Seven years ago, I was with Skylene. I sucked her dick, he moaning got louder when she was about to come. Then she jerked off until she came like an oil geyser.
Those were my experiences.