the word "Oh"

Does it ever annoy anyone that when your talking to someone and they say "whats up" and you say for instance"im on youtube" and then they say "Oh".I mean is there something surprising about you being on youtube.Its not like you looking up "were to purchase WMDs".really?..there could also be the possibility that there judging you like "Oh.you've been on youtube,Oh,uhhh,how long have you been on youtube? and you say"uh like 2-
"you addict!!!!"
like seriously,don't use the word "Oh"...that's a road of unnecessary you don't wanna go down