How to read a brother:
If your brother seems to go through even more hair gunk and after shave than normal, they fancy someone.

If your brother becomes oh so nice and friendly, they want something.

If your brother won't stop grinning* then they have done something to you.
*this excludes my brother 'cos he grins all the time anyway.

If your brother gives you something they are ill or in a very very good mood so seize the moment.

to be continued - under construction