This may seem stupid, but I don't understand why a glass rod attracts a block of wax when the glass rod is rubbed with silk and the wax rubbed with wool. I understand that when the wool rubs the wax, electrons from the wool transfer to the wax making the wool positively charged and the wax negatively charge. This makes the rubbed wool attracted to the wax, but repelled by the silk. However, is it the other way around with silk and glass. When the silk rubs the glass, do electrons from the glass transfer to the silk, making the glass attracted to the wax because the glass would be positively charged and the silk negatively charged? I just need some clarification on this.