So I was showing it to someone for a laugh today and discovered that there were quite a lot of comments under that photo already. And that was the start of my descend. I did go through the comments. Pretty much all of them were from gay guys and all of them were complementary, there were no critical comments at all (yes, I noted that but it gets worse).
Previously, I thought that what other men were thinking about my ass was quite unimportant to me but I did get an ego boost (and learned something new about myself I guess). But that's not the end. Because all of the comments were positive, I went to some other photos of guys' asses (yep, I did) by the same photographer and checked the comments under those photos to see whether they also were all positive like mine or not. Yes, I compared some guys' comments about my ass to the comments about some other guys' asses on flickr. I am a grown up (or so I thought) straight man.
And by the way, all the comments on those other guys' asses were positive as well just like mine. I was surprised how well-mannered gay guys were when it came to commenting on strangers' asses even with all the anonymity the internet can provide. It made me wonder if it was generally accepted among the gay guys that when it comes to commenting on someone's ass you have to be nice or stay silent.