Perhaps you guys could reach a compromise and have him allow you to do the facial.. as in when giving him oral and stroking him as he finishes... you take control of where it goes... you can hold your mouth open and take the bulk of it there, then let it hit your cheeks and roll down your chin... this will give him the visual satisfaction of seeing his orgasm on your face without stuff stuck in your eyelashes... know what i mean? Like you, I love oral sex... and my bf treats me with so much respect all of the time, and especially after intimacy... and especially after intimacy where I have done soemthing extra special like that. Its a gift to your lover to submit to them sexually and to please them... and I think as long as your love treats it like the gift it is, doesn't demand of you, but rather... appreciates when you give -- and it sounds like you have such a man.
You do sound lucky and I am as well I think in time, you may grow really fond of the different ways you can treat his ejaculation, especially if you love going down on him. Don't feel humiliated, this is not some one night stand, this is the man you love - sharing an intimate moment with you , there is nothing degrading in that... its beautifully intimate in my opinion.