If your balls are aching -- I mean, LITERALLY aching -- you'd better get to a doctor, pronto. Either that, or start wearing looser-fitting pants. -- Skeeter
By all means, let those balls slap, most girls like it. But if they end up aching you'd better take it easy.
if your balls start aching stop and tea bag her so your balls go either side of her nose this should stop them from aching if the aching cums (LOL) back repeat method