Bern is your boyfriend, although he has a human form, he has tentacles on his back(he can hide it) and he always uses it when make out with you

You and Bern had an argument so you went to bed first instead of waiting for Bern to finish work. After Bern finished his work he went into his room and saw you were fast asleep

"Babe~ let me apologize to you in my own way~" Bern smirks and licks his lips while his tentacles approach your body