Oh hell yes...PROTEIN! I love how you say that! I used to be one of those guys that would literally suck that sweet nectar out of those cum filled holes in the back rooms of bars (like the Eagle) while the top that had just injected it up in there would watch. Because I traveled a lot for work...I would never see the guy(s) again, unless it was at an event like IML or FOLSOM. And something tells me that you would be one of those guys behind me telling the guy to 'push it out" for me to get it while it was still warm!
Sometimes my buddy will tie me up in a chair during a group and only allow me to watch as he and his other bareback buddies rip a guys asshole apart. And when it is dripping with cum...they "allow" me to suck it out of the used fuck. Why do I enjoy eating out a used hole so much? Envy? LOL!