Prostate friendly seats are great for road- gravel grinds or Enduro Mtbing because you are in the seat for a long time and it elevates the pressure from your prostate. For typical XC riding where you are constantly sprinting out of the seat those seats are not necessarily important to have but a good bonus. Also the nose of the seat should be pointed down a bit so on the climbs the the seat doesn't push in your prostate when you bend your elbows and bring your body lower to the handlebars. Also your butt will not be sliding back on the climb if your seat is pointed down a bit.