I Have A Friend Who Likes ...
METS
GAS
TANG
STOOL

SPIDER
DELIVER
STINK
CAMUS

PINS
DESSERTS
But Dislikes ...
ASTROS
OIL
OVALTINE
OTTOMAN

INSECTS
ACCEPT
AROMA
BALZAC

NEEDLES
APPETIZERS
Can you figure out why my friend likes certain words and not others?