I love them.
Infact, when it's to completion I go absolutely bananas. lol I mean, seriously, when harry met sally has *nothing* on me!
I am not a guy so I can not answer for them.
I would like to say maybe you haven’t yet received a great BJ or you mind is telling you it is a girl in a sub position.
I personally think I am in a dom position when doing it, I see it as taking control over a man. Maybe I am strange here, but if you had said anal then I would agree to it being sub.
What I was wondering in your statement you said “Trust me, this doesn't exactly boost confidence of the girl-at-work and that sucks.” Not a great way of wording this, but if it means you loss your erection, maybe you see it as being not the right thing to be doing so you are not totally relaxed to enjoy it. These are just my opinions other may have a different opinion.
Welcome!
I enjoy giving oral sex as much as sex itself, and don't feel in any way that I am submissive to the male. I know many women who are the same and find it rather delicious whether the man cums or not.
I guess it's just about communicating gently to the woman who you are with before she gets jaw ache!!