I like how his rippling muscles are all sweaty from struggling. Hopefully before he worked himself free, someone edged him for a good long while.
He may have been bound for hours. He was edged close to cumming, and then left alone for a while. Then his tormentor returned to edge him again. This went on all day. He was in delicious agony.
Perhaps that's why he wanted to free himself so badly. He didn't want to get away so much as he wanted to cum. He has the worst case of blue balls he's ever experienced.
That would be a much better way to interrogate someone than waterboarding. Keep him bound and repeatedly edge him, on-off, on-off. Play some porn during his rest periods so he says hard. Keep doing this, for days if necessary, until he confesses. Then he can finally be allowed to cum.
Okay, thinking about that scenario has made me good and hard. Some porn producer needs to make some videos with this scenario.
These photos are larger than they appear below and total twenty in number. The set is archived in an online gallery here (mirror here) and can be downloaded together in a free zipped folder here.