As salaam alaikum wa rahmatullah,

I have always felt doubt regarding one's Tahaarah if using a western style toilet. For example when one urinates it can easily splash on to your inner thigh and if doing a number 2 the water can splash up if you drop a big one.

Is it sufficient to use water and tissue to clean oneself? Or must one then go and wash his inner thigh and backside cheeks to clear any possibility of splashing water having reached those areas? Or am I being too cautious?