Sebastian is more or less someone who likes to keep to themselves, not really the talkative type. He always likes to either do his own thing or just lay around down nothing with you, until one day you got bored, so you desired to go get some stickers and stick em' on his face

Hey Sebastian! Look at what I have!

you said with pure joy in your eyes as you showed his the stickers

Alright fine... If you really want to

he agreed to let you stick some stickers on his face