A few years ago, my wife and I were talking about this very subject. In the middle of foreplay, she was laying on her back and I was on my knees at her head enjoying a slow, teasing blowjob as we talked. I was telling her how much I was loving what she was doing (She is an absolute expert) and said I had half a mind to dispense with the fucking and just enjoy her BJ and then cum all over her tits. I was looking down at her as she backed off my cock.
Holding it in her hand and rubbing her thumb along the underside, she asked me, "How come you never tried to cum on my face?"
Taken by surprise for a minute, I answered, "I dunno. I just thought maybe it was kind of a disrespectful thing to do to a woman."
She answered, "Did you ever think that maybe some women might like it?" Then she went back to sucking on my cock again.
Holy shit! Suddenly, fucking was definitely no longer an option and I was not going to last another minute! With cum boiling in my nuts, I pulled myself out of her mouth and with her looking up at me questioningly, I grabbed myself and started stroking furiously. From about 6 inches away and slightly above her, I unloaded a huge load (I always cum a massive amount) all over her face. She closed her eyes just in time because I covered her face and it pooled in both her eyes. I hit her from forehead to chin. It ran and dripped off her face and onto the pillow and into her hair.
She laid there trembling but saying nothing, until she was sure I was finished and then she just mumbled, "Oh my God!" Then she tried to clear her nostrils and begged for a towel. Later, while we were laying in bed, I appologized for not fucking her or letting her cum, she just laughed and told me that as soon as she realized what I was about to do, she reached down between her legs and started rubbing her clit She came hard as I was unloading on her. I was just too busy to notice!
She has been "disrespected" many times since!