I have hair all over my chest and stomach, but it isnt that dense.
Few days ago, while i was trimming and shaving my souther regions, i decided to trim under my arms cuz it was really long. Now it feels way better. While i was doing it, it crossed my mind to trim my chest and stomach too, but i said to myself - noo, it just wouldnt look so nice if trimmed. so i left it the way it was. if my next girlfriend wil want to remove it, then ok.