Here are some of the reasons you might have:

• For companionship

• To fertilize your garden

• Competitive edge

OK, we need to be a little more specific here. Competitive edge?

• To go one up on the neighbours

• To intimidate that Mrs Sidebottom at No.58 who's always complaining to the Council about your seven rottweilers.

What kind of a person are you?

Oops! That's irrelevant to our project.

But what is relevant is that we've now defined our target audience: the neighbours in general and Mrs Sidebottom in particular.