Same experience! And not necessarily with OW, but with things that have to do with them. My H tried skiing (I learned that OW was also learning to ski but in a different city), now buys clothes from a brand name store that OW loves too (he never cared about his clothes before, I had to buy them for him), is drinking tea, listens to young music (he never gave a d*mn about music before), takes pics (so he can MMS then to OW)!
So I told H I wanted to learn skiing too and he blew me away. Of course it hurts, huh? But I think they want to keep the OW experiences unique and separate from what they have with their W - maybe its a defense? I think of it this way: If me and H reconcile, I wouldn't want his memories of what OW and him experienced to be overlapping.
I remember one instance where I learned that H sent OW a video of our favorite song - now that hurt!
Me:49 H:45 D:12 M:14 T:18 Bomb: 6/26/10 EA: 9/3/10, fizzled out slowly, now ??? 11/5/11 Retrouvaille Finally piecing.... Its peaceful at last, but we got a looong way to go