divebuddy,
how is the act of rape connected to the colour yellow, it was named rape yellow because of the colour of the canola plant.
The word "rape" in rapeseed comes from the Latin word rapum meaning turnip. Turnip, rutabaga, cabbage, Brussels sprouts, mustard, and many other vegetables are related to the two natural canola varieties commonly grown, which are cultivars of B. napus and B. rapa. The change in name serves to distinguish it from natural rapeseed oil, which has much higher erucic acid content.
and has nothing to do with the sex act.
Dave.