Why is my bag always so heavy?

It's not like there's a lot in it...

embroidered purse with 2.50 in
chinese silk bag on string with old receipts,  cards and phone in
diary
chequebook
avon order receipt
Impulse paris deodorant spray
Anna Sui 'Dolly Girl' perfume
Hairbrush
Ibuprofen
Sketchbook
Richard's Bicycle Book by Richard Ballantine
Hairclip
Pot of nivea cream
disposable razor
2 Fox's glacier aniseed sweets
comb
pushup pencil
blackcherry lipbalm
pot of cream blusher
sachet of brown sugar
old gig flyers
ambre solaire  spf30 face stuff
black gel roller pen
blue biro
hairband
glasses case
sunglasses
bear keychain w/ keys on
spray deodorant: Lilac Sky