They're commissions but yes, in a sense, I don't mind them in terms of drawing them. Why do you ask?
I love chest inflation myself. It's what got me into inflation in the first place. I also noticed you watched BreathyChestMan.
I've drawn some chest expansion myself. I thought you might like this one:
Ah. Cool. Well I followed him because I follow his youtube channel, that's really about it.