Proto Porn
Muscle-Addicted: Valantis Dokos
Manrumpsxxx: Follow Me For The Sexiest Rumps On Tumblr
Keepemgrowin: Keep Fueling Those Muscles, Bro…
Drwannabe: Fadel Al Khamisi
Drwannabe: Jeff Long
Drwannabewannabe: Ali Zamani
Hunting For The Very Best
Myfavoritemusclemen: Tayseer Al Khalfan
+ Muscles
Joel Thomas
Proto-Humanoid: Chris Tuttle. Thanks @Musclefocused
Fanomuscle: John Leslie
AsianNSFW
AsianNipples