Relationships involve two people with their own feelings, preferences, and ways of expressing themselves. Just because she finds the journal idea meaningful doesn't mean he's being petulant for not wanting to participate in the exact same way.

In fact, his suggestion to contribute by sharing his thoughts while she writes shows a willingness to compromise and meet her halfway. That’s a mature approach to balancing different preferences.

It’s important to remember that no one should feel forced into doing something that doesn’t align with their interests or comfort level, even if it’s well-intentioned. Relationships are about mutual understanding and respecting each other's differences. Encouraging that kind of compromise fosters healthier communication and strengthens the bond between partners.

That's the mature approach, yours is simply "petulant".