On one hand, there is nothing in the Bible that explicitly states that masturbating to inappropriate content is a sin. inappropriate content in its current form did not exist until at least the 19th Century, although there were inappropriate contentographic frescoes found in Roman brothels of Jesus' time period.
However, there are many references to "lewdness" in the Bible, and one could easily interpret the word to mean anything they would want it to be; therein lies the danger.
One thing you have to understand is, that unless something is explicitly stated one way or another in the Bible, it is NOT Biblical, and therefore is merely an opinion (and can be ignored as such). An example of this would be a sermon, which is usually a pastor's learned position on one matter or another.
Aside from being Biblical, there are still the results of one's actions (or inactions) that one would need to consider: when you do (or don't) do something, are you conforming to Jesus' commandment "Love one another?" If you love someone, would you therefore do (or not do) something that might cause pain, distress, suffering, etc.?
Are we going to be consigned to the Lake of Fire because we do something that, in the OPINION of others, is sinful? I think that this is unlikely (this too is an opinion, and I will state it as being such).
The danger in equating opinion with the Word of God is that we become like the Pharisees and Sadducees of old; we all know the kind of contempt that Jesus had for those people!
Notwithstanding, I still find opinion to be interesting, especially when it conforms to that of my own
... and I imagine that most of us feel the same way.
Your brother in Christ,
Biblical Christian
