Must one wash the buttocks, the testicles, the penis, and the muscle connecting the penis to the buttocks if they are splattered with urine spray during urination?

If the feeling of spray splashing is merely a doubt or a whisper [from Satan], then one should ignore it. However, if you are certain that spray has touched a part of your body, then the affected area should be washed if it is urine, because urine is not among the impurities for which a small amount is excused by many scholars. If it is a small amount and will lead to obsessive whispering, then it is permissible to adopt the view of those who excuse a small amount of impurity. But if it is a large amount, or if you wish to follow the opinion of the majority, then it is obligatory to pour water over the affected area, which is an easy matter.