I so agree with Tom Petty about that. I don't know what the rest of the song says, but that line rings true. I think I could (almost) handle rejection, but not knowing is the worst.
I applied for a job recently and I waited with bated breath for a response. I was 98% sure I got the job, but I didn't want to say for sure until I got the offer.
Same thing goes with trying to sell: I can ask, but until I hear back from my potential clients, I'm wondering do they like, don't they like, are they ignoring me, are they just busy and will say yes...eventually?
Sales are my downfall, I don't want to appear pushy but I don't want people to forget me either. There is some saying about having to ask 5 times before you get a yes, but I'm as much an instant gratification junkie as the next person. Or I'm just impatient and hate waiting, you decide.