Apologies for the novice question, but I have just bought a Sennheiser MM100 Bluetooth headset, which I am very pleased with. I use it principally on my iPhone and have paired it with my iMac i5. I have two questions: 1) I initially paired with my iPhone and then with my iMac, both successfully, but when I went to use my headset with the iPhone, I had to go through the pairing process again. Does anyone know if this is 'normal', if it is ,it is very inconvenient. 2) My wife is so impressed that she wants a pair for her iPod Touch. Does any one know, if there can be a conflict, if two bluetooth headsets are used in close proximity?