Typing subconsciously

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While taking my bath, I have to keep an attentive ear in case the phone rings and listen if anyone comes to the gate. While browsing the net, I have to flip between mylot, yahoo, and Facebook. I shouldn't be doing more than one thing at a time but I find myself doing so. What beats me is that recently I discovered that I don't even think any longer when typing my username and password. I just do it as if it could be done while sleeping. Remarkably, I don't make a mistake. I find it odd that my subconscious should be playing tricks with me this way. Does it happen to you?