My partner loves oral sex and she's usually taking the lead. I have sometimes mounted her from above, inserting my cock in my mouth, and she responds with enthusiasm, but she rarely lets me do the 'work'. However, I'm excited by the thought of her simply lying back while I thrust with increasing speed until orgasm. I could of course ask her about this but I'm be curious to know if this approach - with the right man - appeals to other ladies too, or whether most prefer to be the 'active' partner.
I'll add that I like 'fucking' my partner with my tongue, and she must enjoy it in view of the intense orgasms that have resulted.