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   The Dumbbell Theory by youthfully

   Fandoms: ENHYPEN (Band)  

   • Explicit
   • Creator Chose Not To Use Archive Warnings, No Archive Warnings Apply
   • M/M
   • Complete Work

   10 May 2026

   Tags

   • Creator Chose Not To Use Archive Warnings
   • No Archive Warnings Apply
   • Kim Sunoo/Park Sunghoon (ENHYPEN)
   • Kim Sunoo (ENHYPEN)
   • Park Sunghoon (ENHYPEN)
   • Alternate Universe - Non-Famous
   • Gym Owner Park Sunghoon
   • Pilates Teacher Kim Sunoo
   • Humor
   • Sexual Tension
   • Resolved Sexual Tension
   • Competitive Behavior
   • Anal Sex
   • Anal Fingering
   • Rimming
   • Blow Jobs
   • Semi-Public Sex
   • sex in a gym
   • First Time
   • Flexibility kink
   • Come Eating
   • Top Park Sunghoon
   • Bottom Kim Sunoo
   • Pilates vs Weight Training
   • they fuck about it
   • Porn with Humor
   • No Lube (they make it work)

   Summary

   Sunghoon owns a gym. He lives and breathes weight training: upper body strength, progressive overload, the whole deal.

   Sunoo is a pilates devotee who can bend himself into positions that shouldn't be physically possible and will gladly tell anyone who'll listen that core strength is what actually matters.

   They argue over the philosophies of each type of exercise one day. Naturally things escalate, one thing leads to another, and somehow the only logical resolution is to fuck about it.

   Language:

   English

   Words:

   12,214

   Chapters:

   1/1

   Comments:

   21

   Kudos:

   534

   Bookmarks:

   136

   Hits:

   6,700

   Bookmarked by En_vhs

   25 Jun 2026

   Bookmarker's Tags:

   • Kim Sunoo/Park Sunghoon (ENHYPEN)
   • Smut

   Bookmarker's Notes

   The dumbbell theory by youthfully