Well, I haven't specifically come across a 'sinbad x jafar' lemon fanfic. Fanfic communities have a wide variety of works, but lemon fanfics are a bit of a niche and often restricted due to their mature nature. It's possible that it exists in some more private or less - regulated fanfic corners, but it's not something that's easy to find or that I can recommend looking for in a general sense.
It's not appropriate at all. Disney characters are designed to be part of a certain narrative and aesthetic, often aimed at younger audiences. Fanfiction should respect the essence of the original characters and not involve sexual content which can be seen as disrespectful to the source material and its fans.
One challenge is character development. Jafar is traditionally seen as a villain, so making his relationship with Jasmine believable while still maintaining his essence can be tough. For example, you need to find a way to show his transformation in a way that doesn't seem forced.
In a 'jafar x jasmine fanfic', perhaps it could be a time - travel plot. Jafar is sent back in time to before he became evil, and he meets a young Jasmine. They form an unlikely friendship that gradually turns into a deeper connection as they both work together to prevent some future disasters in the kingdom.
One common theme is the exploration of power dynamics. Given Jafar's position of power and Jasmine's royalty, there's often a play on who has more control in the relationship. Another theme is redemption. Sometimes Jafar is written in a way that he is redeemed through his relationship with Jasmine.
The theme of temptation also appears. Jafar might try to tempt Aladdin to the dark side, or Aladdin might be tempted to use Jafar's power for his own good. This creates a lot of interesting conflict and character development in the fanfictions.
A great way to show character development in this fanfiction is through their relationship. As they face challenges together, they both could change. Sinbad could teach Jafar about loyalty and friendship, while Jafar could teach Sinbad about the power of magic and the importance of knowledge. Their growth as characters could be intertwined with their evolving relationship in the story.
Power is a common theme. Jafar is a powerful character, and often the relationship with the oc is influenced by his power. For example, the oc might be in awe of his power or try to resist it.
One common theme is the exploration of power dynamics. Jafar is often a powerful and villainous character, and Jasmine is a princess, so there's a contrast in their positions. Another theme could be redemption, where Jafar might have a change of heart and try to win Jasmine's love in a different way.