pinkflameinthepan

Hey, First of all, i’m very new to the bass, so sorry if i mess up any terms and such. When i sit down with my bass, (guitar) strap on, it sits fine, but only as long as i hold the neck. When i have to play an open G-string for example, i can’t really hold the neck anymore and the neck and headstock just fall down, like the most of the weight of the bass is there instead of te body. Does anyone know how i can have it sit right? i’ve tried fastening or loosening the strap, putting it on the other way around, but with no success. Thanks in advance! Mavis