A collection of OwOs and their uses:
OwO : Standard use, for noticing bulges
owo : When the bulge isn't as big
uwu : When you're not impressed by the bulge or there isn't one
ÒwÓ : Mischievous OwO, for when you're feeling devious
□w□ : The OwO for people who wear glasses
●w● : The OwO if you're wearing sunglasses
Owo : For feeling confused of the bulge
♡w♡ : The legendary OwO, used for bulges so large that you get heart eyes from it. Do not use this emote lightly, for the power of it is great