Making tank purchases when you're in a relationship

just buy what you need and slip in something once in a while say nothing and do not admit to putting anything in the tank again...... someone must have brought that over and put it in there how nice of them..... Works for me some times ..... forget to mention a decimal in the price of some thing you get from some one else. sell some thing and put that money in the joint account and say I am now selling stuff and adding to the joint account when it should be going back into the othere account where it came from.... They think differntly after that....

Bill