Manipulation. Shego might kiss Drakken to get him to do something she wants. Maybe she needs him to be more focused on a particular plan, and a kiss is her way of getting his full attention and cooperation.
A dare or bet. In the wacky world of villains, they could have made a bet with each other or been dared by another character. And the kiss is just them following through on the challenge in their own, unique way.
Love. Despite their villainous natures, they could have developed deep feelings for each other over time. The kiss could be the culmination of those repressed emotions.
Yes, there are quite a few. You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'drakken and shego kiss' and you'll find a variety of stories with different takes on their relationship.
Archive of Our Own (AO3) is also a good option. It has a well - organized tagging system. You can look for the 'drakken' and 'shego' tags and then narrow down your search to stories that involve a kiss between them. Additionally, some smaller fanfiction communities might also have such stories, but they may be a bit harder to find.
One popular 'Drakken and Shego in love fanfiction' is 'Love in the Shadows'. It beautifully explores their relationship with a lot of character - driven moments. The author does a great job of showing how their feelings develop over time in a way that feels true to their personalities.
The main appeal is the contrast in their personalities. Drakken is often bumbling and Shego is more competent, so seeing them fall in love creates an interesting dynamic. It's like two opposite poles attracting each other.
One popular trope is the 'enemies to lovers'. Since Shego and Drakken start off as more of an employer - employee relationship with some bickering, this trope fits well. It's exciting to see how their relationship evolves from that to a romantic one.
You can try some popular fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a wide range of fanfictions, and you might be able to find ones about Shego and Drakken's relationship there.
Perhaps it's a moment of vulnerability. Drakken might be feeling down about a failed attempt, and Shego, in an uncharacteristically tender moment, kisses him to cheer him up. It shows a different side of their relationship, one that has a bit of emotional depth.
In fanfiction, their kiss might be a way to break free from the expectations placed on them. Harry is always seen as the hero and Draco as the villain's sidekick. By kissing, they are defying those roles and expectations. It could also be a way to gain power over each other in a different sense. Instead of the usual power struggle based on magic or family name, the kiss becomes a new form of power dynamic between them.
Another possible reason is the need for comfort. Elena has been through a lot in the supernatural world. Elijah, with his calm and collected demeanor, could offer her a sense of safety. A kiss might be a way for them to find solace in each other, especially in a fanfiction where emotions are heightened and the characters are constantly dealing with life - threatening situations.
One reason could be the development of a romantic relationship. If the fanfiction is exploring a love story between them, a kiss is a natural way to show their growing affection. Another reason might be a moment of intense emotion, like a reunion after a long separation or a situation where they realize their deep feelings for each other.