>>122628If I personally see myself liking the new appearance, I'd accommodate the request. Not great if one or both partners are unhappy afterward.
Personally, I prefer short hair on girls and I've surely asked and she tried it and we both loved it, so it'd only be fair if I listened to one of her requests (no shade on long hair, they're both great).
Some level of reciprocity is nice. If you're unsure about your decision, then maybe propose that each of you makes a change to make it easier. Can even make a game out of it to see who sticks with it the longest.
If the goal is losing weight, then it's even a nice bonus that you got some positive health benefits from it. Can make for some nice gym dates if you're both doing the same thing. And the added bonus of seeing your partner in workout attire heh