var userDrinkAnswer;

function submitDrinkAnswer() { // func is called from HTML
  for (...) {
    userDrinkAnswer = radiosDrink[i].value;
  }
  return userDrinkAnswer;
}

//same with userApologyAnswer;
//same with userPlaceAnswer;

let myAnswers = ['Tea', 'Massage', 'Zoo'];
let hisAnswers = [userDrinkAnswer, userApologyAnswer,userPlaceAnswer];

function findMatch() {
  for (let myAnswersIndex = 0; myAnswersIndex < myAnswers.length; myAnswersIndex++) {
      for (let hisAnswersIndex = 0; hisAnswersIndex < hisAnswers.length; hisAnswersIndex++) {
        if (myAnswers[myAnswersIndex] === hisAnswers[hisAnswersIndex]) {
        document.write(myAnswers[myAnswersIndex]);
      }
    }
  }
}

findMatch();

function findMatch() {
       for (let index = 0; (index < hisAnswers.length) && (index < myAnswers.length); index++) {
            if (myAnswers[index] === hisAnswers[index]) {
                document.write(myAnswers[index]);
            }
        }
    }