Rules & Etiquette
Bid and play decisively
When it is your turn to make a bid or play a card, do not touch the cards or start to pull one out until you have made your final decision.
If you pull a card or bidding card out so that your partner could see what it is, if he was looking in the right direction (it doesn't matter if he was, just if he could have been) then it counts as played.
If you give any indication of what other bid or play you might have made, this puts your partner at risk of being accused of using unathorised information on any subsequent bids or plays. You can avoid putting your partner in a difficult position by waiting until you have decided what you are going to bid or play before touching the cards.