Originally Posted by
theoriemeister
Following on oldblue's suggestion, take your time with her.
Back in grad school I dated a girl (for about 2 years) who was not only a virgin, but had had no sexual experience prior to me. She wanted to 'save herself' for marriage. So at first, I used to get her off by rubbing her pussy. I'd then straddle her and she'd jack me off (onto her chest). It took a while before she'd even give me a blowjob, but eventually she did--but she never, ever let me cum in her mouth. So when I got ready to cum she'd pull off and let me cum on her tits. Once when she was blowing me, I asked if when I came I could cum on her lips (rather than neck and chest). She let me do that and, using my cock, would even let me rub it on her cheeks. Turned out, she like the smell of semen--sort of reminded her of cut grass. So cumming on her lips became a pretty regular thing. But sometimes if I had an especially big orgasm some of my load would shoot above the lips onto her nose. Eventually she began to rub my cum all over her face. And it was not too long after that she'd actually let me cum on her face (she'd always jack me off onto her face), which I continued to do until she moved away and the relationship ended.
It probably took at least a year before this happened, and with luck your wife may eventually come around. As some of the others have suggested, don't be afraid to express your desire, but don't be pushy either. Who knows, she might get drunk one night and let you do it. And if she does, be sure to tell her how hot and beautiful she looks with your cum on her.
Theorie
p.s. on a related note, my current gf and I have been together for about 4 years. When we first met she thought the idea of anal sex was gross and disgusting. She'd NEVER let me even touch her asshole. However, in the last couple of months she even admitted to fantasizing about it during masturbation. I told her I'd love to try it sometime; but I'm in no hurry to do it. I think eventually she'll let me try. Slow and steady encouragement. . .
p.p.s. sorry to be so long winded!