Sharing such explicit experiences is not appropriate in most social and public settings. It involves very private and often sexual content that violates social norms of propriety and respect for others.
Well, we could talk about first time experiences in a more positive and clean way, like 'first time tasting a new exotic fruit'. It was really exciting. I remember the first time I tried a dragon fruit. Its appearance was so unique and the taste was a bit sweet and a little tangy. It was a whole new sensory experience.
The phrase 'black cum erupt mouth story' is really hard to decipher without any background. It might be a creative or experimental phrase from some niche genre of writing or art that I'm not familiar with. Maybe 'black' could refer to something negative or mysterious, but it's all speculation without further details.
Since I don't have prior knowledge of this'stealing friends socks cum story', it's difficult to say. It might be a fictional story created within a particular group or community, perhaps with some humorous or odd elements related to stealing a friend's socks, but the 'cum' part is unclear without more context.