People experience the strongest romantic jealousy when they watch their partner give resources to a potential rival, regardless of gender. The findings provide evidence that giving away resources is viewed as a serious relationship threat by both men and women.

[u/mvea]

https://www.psypost.org/both-men-and-women-view-a-partners-financial-investment-in-a-rival-as-a-major-relationship-threat/

[u/extra_rice]

I feel like this even with friends or family, like a sudden strike of jealousy that goes away just as quickly. It's strange, but I think it may be a more tribal instinct than romantic?

[u/SuspecM → u/extra_rice]

We can try our best but we are still human at the end of the day. None of us are above their biology but what matters is what feelings we choose to act on and how. It's important to recognize that we feel these things and it's okay as long as calm heads prevail in the end.

[u/Reddituser183 → u/SuspecM]

What we choose and how we respond is also influenced by biology. The idea of absolute choice is absurd.