In our case it wasn't so much who decided to buy, but was either of us going to try to talk the other one out of it. It wasn't so much as a joing decision as it was a joint "WOW".
(When we purchased in '93, we got the free park passes up to 1-1-2000., again "WOW".)
Sgtpet, I think having single persons respond as man or woman, depending on their gender, misleads the poll results it looks more like the man or the woman within a couple made the decision.
I don't know if you can change the poll or not. Moderators can edit polls. Maybe you could have Doc add another category for "Single Purchaser". Just MHO.