Honestly, the best evidence we have that Kevin's titties are not, in fact, rocking (other than functioning eyeballs) is that he never wears anything remotely low-cut. Not even a mildly v-necked or scoop-necked t-shirt/sweater. No spaghetti-strap tops. No partially open blouse. Nothing.
Now, it could be argued that he's a coomer so his entire wardrobe consists of nerd merch and "I'm pregnant uwu" shirts, which, yes, but... if his titties really looked so good (i.e. if a bra was enough to tame them from tubular into approximately spherical objects), you'd think he'd be posting cleavage pics all the time with his wardrobe full of ~slutty bimbo~ shirts. Instead, his boobs are tube mooba, and not even a bra that he clearly stuffs all to hell can fix it, and he knows it. "My titties were rocking", no, Kevin, your hormonally enlarged moobs that you've propped up with socks do not count as titties or rocking, thank you.