Are girls jealous of our testicles?

My sister and I were arguing yesterday and she was clearly getting heated trying to explain to me her theory that testicles are poorly designed. She thinks that just because they're exposed that they're weak but she doesn't have them so who is she to judge?
As males, our testes are the centers of our masculinity and therefore strength over women. I do not see how you could not want them.
Is she jealous/projecting? Do you women feel inadequate about your groins or the strength you miss out on without testicles?
Are girls jealous of our testicles?
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