It depends on the age, some people develop pecs early, others develop them later. You need to have big pecs to bounce them, I could do them when I was 14 because they were big enough then, but that's just how my body developed.
How do I Flex my Pecs When I'm Young?
Odudu Abasi Mkpong
I am a freelance writer and a computer techie who is adept in content writing, copy writing, article writing, essay writing, journal writing, blog posts, seminar presentation, SEO contents, proof reading, plagiarism checking, editing webpage contents&write-ups and WordPress management. My work mantra is: "I can, and I will"