All the time. I never learned how to type "properly", so it's easy to type with just one hand as long as it's my right. But Zissou likes to lay on both hands across the keyboard. Once she slept on my hands on the keyboard and I typed a paper under her. She was pretending it didn't bother her just to be stubborn.
I can ONLY type one-handed - never learned keyboarding. It always freaks people out to watch me type.
I tested in at over 55 WPM with my right hand, though. Got lots of practise typing college papers way back when. I use my left hand for shift and tab, LOL!