I've been thinking a lot recently about that concept of "non-sharing" within fandom, and on the issue of self-shipping, and for the life of me, I just don't get it. Self-shipping where one places oneself in a romantic or emotional relationship with a character is an incredibly intimate and imaginative part of fandom. It's a form of sharing feelings, identity, and imagination within the security of fantasy. But some do get possessive about certain characters, and it just seems to mean getting angry if somebody else has the same self-ship or OC. It's absurd to me.
The thing is, characters don't belong to anyone. No one can own a character, dynamic, or relationship. Characters in media exist for fans to read, identify with, and interpret on their own. Other people's ships don't "steal" someone else's personality, and it doesn't deprive someone else of their imagination or experience. Quite the opposite, actually: seeing other people enact the same ships is sometimes inspirational, creating new ideas, new interpretations, or new storytelling styles.
One of the best things about fandom is that it is something done sociably. Shipping speculation, fanart mailing, fanfic writing, and trying out different dynamics whether cannon or self-insert is how communities flourish. If people attempt to gatekeep ships or characters, it takes away from that sense of cooperation. It stifles talk, creativity, and emotional investment. Selfshipping, after all, is very individualistic, but it does not occur in a vacuum. It can be a source of information, empathy, and even friendship for the spectators who might identify in terms they never considered before.
Ownership of characters is typically attachment, identification, or fear of invalidation but that fear is unjustified. Fiction worlds aren't zero-sum worlds. It is conceivable that many people can ride on the same ship or dynamic without spoiling one another's experience. Imagination and creativity aren't drained, they are multiplied. In a real-world sense, respecting other people's self-ships and OCs can actually enhance your own fandom experience and create new meanings and possibilities.
It's freedom in its purest form: freedom to dream, to create, and to share. The same for self-shipping. The more open and shared the experience, the more healthy and alive the fandom. Possessiveness of characters or ships does not save the fandom it will harm it. It is in accepting cooperation, diversity, and mutual enjoyment that the fandoms are challenged to flourish, and in which each fan is seen and called to their own potential.
Finally, shipping or fusing other characters and self-shipping are all done in the spirit of happiness, expression, and bonding. It is all about accepting creativity, not competition. The more we share our self-ships and OCs openly, the more we marvel at the beauty of fandom itself: a world built upon imagination, discovery, and belonging.