"And D for DAYYYUUMMM."
If you've ever played Overwatch, you may have noticed someone playing the healer, Mercy, using her "Imp" skin and slavishly following the toughest player on the team. If you're wondering what that's all about, there's a perfectly simple explanation: That player's way into BDSM. The highly attractive healer character has been a surprise hit within a certain subset of the domination and submission fetish community, leading to people playing her as what they refer to as a "healslut." These players will find a tank (big, burly fighters) to be the "dom" to their "sub." They'll then play their healer like she's a housewife from the '40s, spending the entire match servicing, rewarding, and praising their tank. Oftentimes, they'll have a kinky private chat during and after the match -- praying they haven't been living out their sexual fantasies with a horny 12-year-old who got way more than they bargained for.
The practice of being a "healslut" has gotten popular enough to warrant its own subreddit (warning: you will see animated genitals), where open-minded people share their experiences of submitting themselves in-game.
"Sexually submissive subreddit subscription for sexual AND alliteration gratification."
By now, the practice has leaked over to other multiplayer games, with players even publishing guides on how to be the optimal healslut -- a relative term when it comes to gaming with one hand. In shooters, where the most important thing is usually racking up kill counts and destroying lesser players, it's quite refreshing to see a subset of players who find the greatest joy in healing and supporting their team members. And hey, if in the process someone achieves a win streak in their pants, more power-ups to them.