Quote Originally Posted by WorkingMann
Might be

right here.. But how can I formulate that in a good way perhaps?
My opinion would be something like

this.

Here is a list of possible effects that can be used to determine if they work for you.
1)Bottle sniff

test
2)Arm sniff test
3) Self mood changes
4) Friends react differently with and without them
5) Reactions from

opposite sex including things like DIHL and nervous movement.

Of course my list has skipped all the details but

I'm sure you get the ideal.