I don't bullshit on this site, or anywhere, really. So my opinions are as honest as you're going to get from me
If it's just looking/comparing, not "oh, this turns me on" I don't personally think it says anything about orientation. I
do personally think it says a lot about ego. I do think it potentially says something about competitiveness. I do think it
potentially says something about insecurity. I am glad my sweetie isn't insecure about much, doesn't play into ego stuff, isn't really a show off and is not much for competitive stuff. I have some friends who are a bit more egocentric and competitive and it can get a bit... Tiresome, for lack of a better word.
While I don't/can't personally empathize with a heterosexual man saying how much he admires another man for having a big dick, I definitely can understand a man appreciating oh, say the effort another man puts into being especially fit/muscular/athletic. The latter takes significant effort, the former just is there and exists as is.
To me, natural unaltered breasts or natural unaltered penis are just that. A natural feature, so it isn't something I think is especially note worthy. It's hard to explain as clearly as I would like to, but in my eyes it's similar to if I was proud of the color of my hair. It just kind of is there and exists.
To put it another way, I'm in a monogamous relationship. I'm loyal as heck. That doesn't mean I can't appreciate someone as being attractive, even if I don't want to fuck them or date them. I can see a super model as being attractive, even if they're not my type. Just pulling a celebrity at random. Katy Perry is super not my type, but I can see that other people would find her attractive.
Hopefully my rambling doesn't dilute what I was trying to say too much.