I am most certainly straight, and I am positive that this is not a function of denial for my sexual preference.
But whenever men express emotional affection for me, thereupon revealing a more vulnerable side of themselves, I feel "turned off", so to speak.
I have been in many relationships but very few times have I truly been glad or excited to hear of an emotional dependence on me. It makes me think of a man as childish, which is awkward and occasionally repulsive to me.
Anything of a sexual nature is normal and responsive for me, it is only the expression of an emotional dependence that seems to discomfort me.
For those of you who deem themselves competent in psychology, which I do not myself, I stress that I grew up feeling neglected of physical and emotional nurture from my mother; my hypothesis as to the reason for my disaffection.
But whenever men express emotional affection for me, thereupon revealing a more vulnerable side of themselves, I feel "turned off", so to speak.
I have been in many relationships but very few times have I truly been glad or excited to hear of an emotional dependence on me. It makes me think of a man as childish, which is awkward and occasionally repulsive to me.
Anything of a sexual nature is normal and responsive for me, it is only the expression of an emotional dependence that seems to discomfort me.
For those of you who deem themselves competent in psychology, which I do not myself, I stress that I grew up feeling neglected of physical and emotional nurture from my mother; my hypothesis as to the reason for my disaffection.

I mentioned that to clarify that my aversion to emotion isn't because I'm not sexually attracted to men.
Your story reminds me of men who never cry because they believe it to be "unmanly."
Interestingly, my relationship with my father is excellent. As I recall, he took on the role of nurturer in place of my mother, who is emotionally desolate, and we have a best friend-like bond with each other today.
I find I have much more difficulty establishing friendships with women than with men. In fact, despite once belonging to a close-knit group or clique of girls for the majority of my school life, I have very few individual friendships with those girls. I find it pointless and often uncomfortable to spend time alone with a girl, although there are a select few who I truly love and enjoy.