CHEMISTRY.

If you find chemistry, a bore.

Take a few drops of H2So4

If you want to be, free and light

Take potassium cyanide.

If you want to go to hell

Drink a bottle of HCL.

If you want to get, rid of your life

Take a dose of P2O5.

To make some bricks 

Mix sand and C2H6.

To lose weight

Smell a little C3H8.

If you want to catch a hen

Smell a little C4H10.

Don't go to bed

Otherwise every bit of CHEMISTRY

Will come out of your head.