It's a buzz a
cocksucker gets after swallowing a load of
cum, esp. a big load or several in a row. Attributed to the
testosterone level in the cum, varies per load and/or dude getting blown. Some cocksuckers become addicted to the feeling.
A: I had a cum rush all night long from that load you shot down my throat last night.
B: Told you it was worth it.
A: When you want to get together again?
B: This is just between us, cool?