I am married to an Indian Rapunzel with calf length hair. She loves it when you show interest in taking care of "our" hair. Hairjobs/ bundrops when she's on top are part of the fun.
What is equally more fun and involving is helping her wash her hair and oil her hair. And yes cumdditioning isnt proven to be effective but its not bad either.
I always cumdition my wife's hair when i oil it, and it doesnt get sticky. (just saying)