This is partially why we don't buy each other Christmas gifts or really gifts for any occasion. If we need something for the house then we buy it (when it fits in the budget). It seems silly for me to give a Christmas list of gifts for my husband to buy me and then do the same in reverse. We are never home for Christmas anyway. Always travelling to see my in laws at Christmas (which we enjoy so it's not a burden or a problem). It has worked well for us since we got married, actually long before that.
I'd feel silly going through the motions of asking for sheets for our bed while he asked for a yard vac for yardwork for our house. Let's just buy it when we need it and skip the rest. But, I realize what works for us doesn't work for everyone. If it makes you both happy and isn't hurting anyone then I say keep doing what works!