Take 4-5 sheets of the paper, fold in half, wipe, fold again, wipe again, drop in bowl. Take three sheets, wipe again, check, if it's still got marks on it, fold, wipe again, drop in bowl, repeat until sheet stays white. I wipe with the left hand... my toilet seat has nicks on it from where my watch hits it.
I used to nag the ex-wife about her TP usage because she would go pee, wrap the TP around her hands 20-25 times, wipe once, and that was in lieu of washing her hands.