I don't think the fantasy you described is being rejected for being unethical. It appears to me that not so "many boys" will recognize themselves in your claim. The same goes for the other one about that "dream of every boy in age of puberty".
Because I know I don't, I never discussed it with anyone, nor have I seen or heard anyone ever sharing such thoughts.
So claiming these fantasies as being common for - and therefore applicable to - the majority of the forum members, such as myself, seems a bit bold (to me ... as well).