Guys: When (or if) do you ever lose interest in sucking a GH cock?

[sikfukr]

I'm very impatient. I want cum, plain and simple. When I find a place that has cum puddles on the seats or floors, or spatters on the screen, or loads in the trash cans, or used condoms left behind, I'm in heaven. Otherwise, I'll suck an individual cock for five to 10 minutes before moving on to the next.

What I really hate is when I specifically ask a guy if he'll get off in my mouth, and he says yes, but I end up sucking endlessly. I don't put up with that shit any more.