Beta masturbation has no affect on the curvature of penis. It is a safe way to satisfy yourself. It would do no harm nor any illness. for curvature of penis, worry not, its very common, just read this: https://lovematters.in/en/resource/penis-shapes-and-sizes
https://lovematters.in/hi/resource/men-masturbating
If you want to discuss it at length, join us at our discussion board “Just Poochho”.
https://lovematters.in/en/forum
Beta for curvature of penis,