I pre-prepare them! I told my DH about 3 weeks before VD, " honey, I don't want chocolates this year for vday, as you know I am watching out, I want a subscription to shape magazine instead!
I forgot to tell my mom but she saw how hard I was working and was very proud anddddd she brought over some beautiful roses and no chocolates
It really is hard to say "no thanks" after the fact, so a pre preparation of sorts seems to work best for me and gosh they get it, which is nice : ) It isn't always a subconscience sabotaging type of thing, I really think there is a genuiness wanting to please in many circumstances and perhaps a temp. forgetfullness but with a "reminder" well in advance

, it sure helps with that scenario. well, he sounds like a romantic to me, much more than a sabotageur

I like your idea of suprising him after ; )