Well, I guess it depends on when I want to cum..
I tell the girl to either speed up or slow down etc.
Honestly I dont like hand-jobs that much, i prefer blowjobs

It depends on so many things. If I just go for it then it can be pretty quick, but if I take my time it can take quite a while.

I haven't had a handjob before, but when I masturbate, I last for (not counting foreplay) about 3-5 min, depending on if I stop and go.

takes me a few minutes

...

too long -.- I cant really give a time but its too long