your cock may appear smaller when viewed from above

which implies that probably he appears larger from below. never been in that position, if you have to ask. asking also won't solve the problem... see, the size of your cock might depend on a series of factors when seen by the eyes of a willingful female who desires his oh-almighty power inside her. if she wants you badly, she'll see him a little larger that he actually is, despite the relative position. she might see him as both a tool of pleasure and one of pain, and in that case she probably would see him larger than life itself, too much for her poor little pussy to handle. she'll also see some spikes and metal parts darting off his skin, when pain becomes more than pleasure. and i'd have to say that this is NOT good.

maybe she's drunk as a skunk on spring break, and then, at the slightest error of performance or pumping capacity, she'll see him as small as he was when he (and you) was just a hairless bean painted in red. and then she might laugh at him... or maybe she's just too hungry for him. she wants more and more and more, maybe two of then. HEY! hold on, he was made for being the solo artist in this show, and then he'll really appear smaller after this kind of proposal...

it's always the same cock. how do you see him, it doesn't matter at all.