Naked on the bed and a chubby girlfriend jerking my cock - it's a hot thing. She sits on the edge of the bed in her clothes and massages my penis. Slowly moves the foreskin up and down and it gets stiffer and stiffer. Then she comes to bed without clothes and continues to jerk him off so that I can play with her pussy too. We wanted to see how long he would stay stiff so we could take an impression of him later. Test failed - he quickly went limp again.