Although I really like this fetish (and paid $$$ for sexy, high quality illustrations of these and more with a good story), I think there will be no love on this very niche fetish on foreseeable future as many men become more gay/sissy/femboys and loving dicks and balls or being dominated by other men or dominatrix women now. Even rarer than the futa/shemale/femboys urethra penetration (which are abundant in this forum).