I definitely wouldn't say I've lost interest in pussy, I still love going down on my gf, but I've noticed that seeing her get fucked by bigger dicks than my own, and seeing her fucked by men that are more athletic and "better" in bed than me, makes me want to have sex with her less and want to have sex (receptively, of course) with big dicked men more. Ultimately I think that's where this lifestyle leads us