If someone ejaculates in a bath tub and then a while later a girl fills the tub with really hot water and has a bath for 5 minutes what are the chances of her being pregnant?

sperm does not die when it hits water. this is a myth.. sperm swims. this is what it does best, if it were that easy contraception would be really easy. exposure does not kill the sperm either. if this were true ivf and sperm donations would not be possible. however if all the semen is thoroughly washed away and not just sitting in the tub it is very unlikely.