Originally Posted by Zweig [Only Registered Users Can See LinksClick Here To Register]

Since having your breath cut off for long periods of time depletes your body of oxygen, this can't be a good thing for your brain if done often. Do it safely, with some breaks and not every day.

You can get friction burns on your nose, especially if it's big, if there's any movement. Also, depending on the shape of your skull, weight and firmness of the person astride it, your eyes could be under huge pressure, which is also not a good thing I assume. Happens only with big girls.