“Legally Blonde” star Reese Witherspoon brags that actor-hubby Ryan Phillippe has hyper-fast hands when it comes to changing their kid’s diapers — and he’s beaten the . . . er, pants off every one of her mommy pals in timed competitions! Ryan’s average speed is nine seconds flat! The star learned to hustle the Huggies as a kid helping his mom when she managed a day-care center!