is this safe

You take a towel and put it at edge of bathtub. Then sit on it and just before your about to cum put one knee in tub and one out while sitting You have one leg in tub and one out and your dick is on edge. and you won't cum but you get the feeling and you can masturbate for a long time and the feeling doesn't ware out

 

sounds safe..........................

 

Unless your legs slip outwards, in which case brace yourself.