New or clean bras can sometimes be itchy, especially if they have been washed in a brand of powder that is not your usual. Worn once in a non-vital situation, they are softer, more comfortable and you know if they will a)show through or peep out from you chosen "costume"; b) you'll know if the wires are likely to stab you in the tit at an inopportune moment: c) you'll know if the wires are going to squeak every time you move or breath deeply and be heard on the mike (especially if using a lapel mike) and d)you can work out the straps and if they are likely to fall down under a sleeveless garment.

And you blokes thought choosing a tie was difficult.

LTS