BDSM 2nd edition: intense power exchange %e1%b4%b3%e2%81%b1%ca%b3%cb%a1%e1%b5%9b%e2%81%b1%e1%81%81%e1%81%81%e1%81%81%e1%81%81%e1%81%81%e1%81%81%e1%81%81%e1%81%8197cb