Would you purposely ask or move to doggie position, because you want to fantasize about a different partner during sex?
Is it easier to fantasize about taking another lover when you can't see them face to face?
I can't honestly say that I fantasize more in that position. There have been instances - parties, group get togethers, lifeguard beach bonfires - when I might have been blindfolded and wondering who it was inside me at the moment..... Sometimes I can tell, sometimes not. Doggie is a great position for any dick to get in really deep ....
On the other hand, though - I love watching porn vids where the girl is getting it doggie really deep by a well-hung guy - she's on her hands and knees and her breasts are swinging and swaying with the rhythm of the fuck - that is just so sexy - and then another friend comes around in front of her and she takes him in her mouth. Now I've done the two guys and me doggy many times, but when I'm with one guy, and he's plunging deep, I wonder if I look as sexy as the girls in the videos.... someday, maybe I'll let someone video me....