Lab Mice

At a weekend convention of biological scientists, Hannah, a researcher remarks to Pam, 'Did you know that in our lab we have switched from mice to lawyers for our experiments?'

'Really?' Pam replies, 'Why did you switch?'

'Well, for two reasons. First we found that lawyers are far more plentiful, and second, the lab assistants don't get so attached to them.'

Photograph: Wikipedia