be obsessed with...What does it mean?
1.Sam is obsessed with personal hygiene.
I don't know if it means Sam cares about her personal hygiene "a lot" or "too much"?
Does it make you think Sam is weird, or it's normal, like many girls are?
2.After the band stopped playing, people drifted away in twos and threes.
What does "in twos and threes" mean?
Thank you for answering.