There's almost certainly parts of Joan that Ted will never personally experience either. How she reacts in a dangerous situation, for example - hopefully he'll never have to be in a situation where he could see that, no matter how impressive Joan might be. For example, Ted would gladly go his whole life where the only guns that ever get shot at him are water and nerf.

He leans over and kisses her cheek happily. "You wanna sit back and just chill for a while now?" he suggests.