Any phlebotomists out there? I am curious about something...why do phlebotomists get mad at me for requesting a Butterfly?

I have horrible deep veins that do not like to cooperate. Before I found out about Butterflies, every time I'd had blood drawn, they'd miss or go clear through the vein, they'd dig around in my arm with the needle hoping to find the vein, and/or I'd end up getting stuck in both arms and the back of the hand, and I'd leave with nice big bruises or hematomas. I gave up on donating blood because many times they couldn't get a good enough stick to collect a full unit of blood. But since I've been asking for Butterflies, blood draws are a piece of cake! They always hit the vein on the first try and I get a lot less bruising.

So am I out of line for asking? I ask nicely. And I'm not trying to imply that the phlebotomist doesn't know what they're doing. Here was the response to my request this morning:

<sarcastic tone> Well, if you INSIST that I use a Butterfly, then I guess I have to. I've been doing this for 22 years, but it sounds like you're the expert.

Nice. Anyway, I guess I was insistent enough because she used one and hit the vein right away and I only have a quarter sized bruise.