I think this as with most other activities talked about here is a matter of personal preference. Mine is with eye contact. Good oral is not just a one-sided pleasure, both partners get pleasure if it is done correctly. SO it is a shared experience. How can you share it without the contact between you? Yes I know you have 'contact' between mouth and cock, I meant more emotional or I have read where some do not believe it is essential or absolute. I agree it isn't absolutely necessary to have eye contact when getting a blow job. The question is why would you not want it.
I do have a concern with that seems to be a new phase and that is blow jobs with no hands and no eye contact, suppose to promote Dominance and control. I want her hand on my cock and her face and neck and tits and anything else she wants to use. I can jerk off alone I want to be stroked and enjoyed.



