Thanks for all your replies, its helping me work out where I am going wrong. In answer to come questions, my OH is pretty relaxed about pleasuring me, and doesnt have a problem with me cumming elsewhere, like on her boobs or pussy. I think the issue is me cumming on her face, not her in general.
We have vastly different sex drives, so she is happy with intercourse once a week, and I need some relief more often than that, so we are pretty well versed in wanking me off in fun ways. Its just when I take aim for her face, she looks a bit fearful, as opposed to really into it as I hope for.
In terms of cumming in her mouth, this is something we do, but more when she is in the mood, but she does like this and likes to do it when she is in the mood. I figured a facial was a good sexy alternative to a blow job, as its more for when shes not up for a mouthful so to speak
Avreille, its interesting about what you said about porn, and how facials can be pretty vile - i had the exact same thoughts, I tried looking for some porn, something that was erotic and sexy to show her how my fantasy is, but most facials are shot in a pretty 'porno' style way, and I gave up looking as I dont think it would help my cause.
I think I need to work on the communication side of it a bit more, and talk about her fears. That last time we had a go, we did it in the shower, and that was a bit better, better environment, so some i think is about the messy-ness, but I think some is an emotional barrier, And if I cant get over that, then I will have to respect her and give up.... trouble is, she is such a sexy girl, thats the whole reason why I want to cum on her face!
Thanks all, any more insights gratefully received.