I though it was a smiley face. I used it everywhere. Now I'm banned from lots of forums. =(

Solarpunk is a movement focused on a positive, ecological vision for a future where technology is used for human-centric and ecocentric purposes. It is a literary, artistic and aesthetic sub-genre and is also closely tied to eco-political activism. Solarpunk narratives have a distinctly positive and utopian foundation in contrast to the often dystopian visions found within other "punk" science fiction genres.

What some people might consider a horse smiley is actually a depiction of a man's reproductive organs, & when used incorrectly, it leads to a lot of confusion & discomfort.

An extremely small penis or chode, with an enormous head but small balls

A penis
other examples:
8==D
8===D
8====D

Pretty much the universal symbol for dick. But it can be ok through parents if you say it means smile.

A delighted gentleman with sunglasses on his head.

That, or a very unhappy gentleman who isn't very well-endowed.