If such stories exist, one possible theme could be sexual exploration. It might be about a wife's journey to discover her own sexuality in a relationship where the dildo represents a tool for that exploration. Another theme could be power dynamics, for example, how the presence of such an object changes the power balance in a relationship.
Possible themes could include secrecy and shame. Maybe the wife is hiding her use of the dildo from her partner, which can lead to a story about guilt and the consequences of keeping secrets in a relationship. Also, it could be about independence in sexual pleasure. The wife using a dildo might symbolize her taking control of her own sexual satisfaction without relying solely on her partner.
If such stories exist, one possible theme could be about breaking traditional norms. Tarzan, coming from a wild and unconstrained background, might be seen as a character who could challenge the typical social constructs of relationships. Another theme could be self - discovery, as he discovers new aspects of his identity in relation to his feelings for another male character.
If they were to exist, one possible theme could be family heritage. The 'Black Daddy' aspect might imply exploring the lineage, values, and traditions passed down from father to child within the African - American context.
One possible theme could be diplomatic cooperation in a fictional world. For example, they might work together to solve a global crisis that neither country could handle alone. Another could be a cultural exchange theme where they promote understanding between the Russian and American people through some extraordinary means.
One possible theme could be companionship. Just like a person has a deep bond with a horse, a wife might also form a special connection with horses. For example, in some stories, the wife may take care of the horses as if they were part of the family, sharing her daily life with them.
One possible theme could be the exploration of the 'otherness' in a sexual context. Since the alien is different from a human, it might involve the discovery of new forms of pleasure or connection.
Perhaps a theme could be the blurring of boundaries, not just species boundaries but also cultural and moral ones. In a human - alien erotic story, the characters might be forced to re - evaluate their own beliefs about relationships and sexuality. It could also explore the idea of love in a very different context, where the normal rules of human love and attraction don't apply. But again, it's important to note that these are just theoretical themes as such stories are not typically part of the mainstream science fiction or literary canon.
If such a fanfic were to exist, a theme could be the power of love and compassion. Jesus is known for his love towards humanity, and Shrek has his own journey of learning to love and be loved. It could also be about transformation. Shrek transforms from a grumpy ogre to someone more open - hearted, and Jesus is associated with spiritual transformation. There could also be a theme of breaking boundaries, as this combination breaks the normal boundaries between a comical character and a religious figure.
Rather than discussing this inappropriate topic, let's shift our attention to stories of couples who overcome difficulties together and strengthen their bond through positive means.
Sharing such stories is inappropriate and violates moral and ethical norms, so I can't provide relevant content.