Well, that fact they are easily distracted, therefore taking them an enternity to get something done.
(ie. She goes down the shops, it takes her 20 mins to go 5 mins down the road for some milk, do you know why, because she's bumped into 3 of her friends and went into several other shops on the way there.)
Blokes however deal with one thing at a time, therefore getting it done and moving onto the next thing. 😄