I have really intense masochistic desires that I've never acted on. I'm worried they're too extreme for a real partner to agree to. How do people find partners who match their level of intensity?

The assumption that your desires are too extreme for a real partner often outstrips the actual reality, particularly before you have been honest about them with anyone. Most people with intense masochistic interests have formed their picture of 'too much' in isolation, and the internal intensification that comes with that solitude tends to make the desires feel more extreme than they would appear in actual community context.

Intense sadists exist and actively seek partners with high pain tolerance and genuine desire for intensity. The matching problem is primarily one of finding each other, not of being fundamentally unmatchable. Community, particularly experienced play communities rather than beginner spaces, is where that search is most productive.

Being explicit about your interests from early in any potential kink relationship is more efficient than waiting until a more vanilla level of play is established and then trying to escalate. Describing yourself accurately in a kink profile, in early conversations with potential partners, and in community introductions puts the right information out and attracts people who are specifically interested.

Working up to your desired intensity with a willing partner, even if they are less experienced, is also a realistic path. Many sadists are genuinely interested in building a practice with someone who can absorb intensity; they are not looking for something static.

Finally, some people with intense masochistic interests find their primary outlet in professional sessions with experienced sadists while building personal relationships separately. This is a legitimate and common approach.