Ladies: even if your Knight-In-Shining-Armour is most helpful in helping you with your bags, when it comes to using the trains in Europe, which are a joy to ride, YOU will need to help him get bags on and off the trains quickly due to other passengers needing to do the same.
You will find that working as a team works best, especially if you are faced with a quick change of trains.
You will generally always have enough time as long as you are smart in your advance preparation. This advice holds as well for other modes of travel such as using water taxis in Venice or Jeepneys in Manila.