Jacen Zhu, shown above having his rectum penetrated by his top-man, is using both his body language and his facial expression to convey the "thrill of the moment" in having another man giving him his sexual satisfaction. Having himself fucked by another is one of Jacen's pleasurable physical occurances.
Sharing his underarm hair and his firm nipples on his chest are two excellent examples of his excitement. I can understand his feelings and agree wholeheartedly with his emotions!
As an almost exclusive bottom-man myself, I readily identify with the feelings that Jacen is exhibiting here. Another man inserting his erection into the depths of our anal cavity delivers untold passion and relief and sends a message of extreme gratification throughout one's body. It is like being transported into paradise!
There is little comparable to the ecstasy being fucked delivers! It is indeed a magical experience!
Versatility matters, guys! Be cool!
Keith Cuffee