honestly, as I am a person who uses a photo "similar" to what the post talks about, liking it or not, it is not something very far from a dick picture, I feel that I will eventually be attacked and that here should not be my place of talking.
but in my opinion, I honestly don't see any problem, and I'll explain why;
as much as people refuse to admit it, this is almost a porn site, since the vast majority of users come here precisely for that reason, as well as everyone here is an adult (at least that's what I hope)
there are some people saying things like "oh, but would you wear a shirt with a picture of your dick on the street?" no, because the street is a place where people of any age can be, including children, and it is a place where there are stricter rules than here (and with good reason) since it can cause serious physical harm to people depending on the circumstances~ in addition to be an outdoor place.
it's not the same here anymore, it's a site for adults whose majority have already tried sexual relations, and which doesn't offer physical risks to its users. as long as you're not sexually harassing anyone in the private messages, I don't see what's wrong.
another observation is that some people have said things like "if you use a photo like that you're just someone without creativity and you think this photo represents your character" or something like that, but I disagree. the picture I use as a profile, for example, is a picture that in my genuine opinion turned out pretty cool compared to the other pictures I took, and which I find really pretty and attractive (compared to many others that were flawed) and I think it's cool to share it. sometimes the person is the more "exhibitionist" type and simply feels proud or positively views the photo he took.
if you are reading this post and disagree with my opinion~~ if possible, avoid jumping to conclusions about me or attacking me. you are an adult, act like one, and just argue in a healthy way and show your arguments to rebut me instead.