I'm a girl and I can flex my boobs similarly to a guy flexing his

Fitness babe takes pics seconds apart to show how body looks breathing in and out - Daily Star

Can females do flexes with their breasts? - Quora

hips.hearstapps.com/hmg-prod/images/wondering-how

Can women move their chest (breast) like men when they PEC bounce? - Quora

Why Some People Build Muscle Definition More Easily

I can flex my boobs, can most girls do this or is this just me? - Sexuality

Searching for a Girl Who Can Pec Bounce

I can flex my boobs, can most girls do this or is this just me? - Sexuality

Woman boyfriend muscles hi-res stock photography and images - Alamy

Flexy guy tries to rip jeans #stayflexy, Ripping Jeans

Podcast #933: The Science of Swole — How to Grow Your Muscles