Every living creature on this planet is extremely sexual by nature... even plant life. If trees had eyes and brains I'll bet they'd make erotic images too. Why are we taught that sexuality is bad? I do believe some things should be behind closed doors so that those who may be offended by it can avoid opening those doors. But I don't believe those doors should be locked from others opening them if I so choose. I like erotic images of women but I understand if some folks are bothered by them.
The best solution would be forum software that had a way to filter our experiences here as set by the user. Don't know if that's available.