When I first got my female, she was completely fascinated with my fingers. Then after her jump out of her tank -she was absolutely terrified of my fingers for a very, very long time. When I found her after she jumped, I had to pick her up with my hands. When I rinsed her off, and put her back in her tank, she sunk like a rock to the bottom, so I stuck my hand in there and grabbed her out. Needless to say, she really did not like that, so after that when ever she saw my hand and fingers, she would swim to the other side of the tank and hide behind her heater and not come out until she saw that my hands were gone. She did that for about 3 months.
Now, she's not afraid of them anymore, and will swim up to wherever I place them.