Sunnybutt, you should check out the reviews on the toy. There are 7 reviews on the toy which you can find here:
link All of the reviews have a 4 out of 5 or 5 out of 5 rating so it's safe to assume it's not painful. I actually own this toy and painful is the opposite of what the toy is.
So yeah, be sure to check out the reviews
Good luck!