Kavod HaRav,
1: May one scratch in the area if it itches him, if he has no desire to waste seed or think of immidesty, but it still is itching? Does it depend on the place?
2: Also, if one's urine stream isn't completely straight, does that mean he is wasting semen?
3: What constitutes a Krus Shafcha who is not allowed to have children?
Thank you very much Rav.