No they're not, here's a few single edged sword types from Wiki -
backsword
sabre
scimitar
Japanese sword
Dao (sword)
Messer
Kopis
Falx
Falcata
Falchion
Scythe sword
That guy ^^^ is only 23!?
He must have had one tough paper round and I suppose delivering newspapers while full of Cocaine would explain why he looks done in.