"Actually, I was doing them when I was still married to Gerhard Richter [till 1993], and it was somehow in relation to what he was doing, you know, these kind of side-to-side gestural abstracts – done like this [gestures as if pulling a squeegee over a surface from one side to the other] like paintings of the 1950's. Mine were called 'Basic Research', they were rubbings of oil paint on canvas – frottages of the floor of my studio. I did quite a few of these. [Gerhard] Richter put one up in his studio for some time.. .But he found it too hard and then took it out after a while."