Best rule for intergender fighting?

Girls, if you have to fight with a boy, in which rule do you wanna fight?
Suppose it's MMA fighting
(1) Groin strike prohibited, both boys and girls wear cup (2) Groin strike allowed, both boys and girls wear cup (3) Groin strike allowed, only boys wear cup (4) Groin strike allowed, cup prohibited Tell me why you choose it.
Best rule for intergender fighting?
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