This is exactly how I have started and ended with different guys in a few random hotel room meetups. We both say we are just wanting to jerk together. We start off jerking and without doubt I always end up on my knees to suck and swallow. I can't just jerk with a guy- I have to service a cock when I see it. Every time they say they just want to jerk and every time they enjoy my mouth and let me suck.