How to bike (as a girl) without hurting (down there)

So, I'm gonna be blunt... Each time I go biking, I end up with bruses (u know where), and it hurts so much. I really don't know if it's something I'm doing wrong, so girls/boys (idk if u have the same problem). Let me know if you have some kind of special technique.

Thanks for reading ^{^}

(Edit : thanks for all the advice! The bike is not mine, so I can't modify it (I'll endure it by now) but once I'll buy my bike I will make sure to buy a good cushion and etc.)