If you think you can not convince them, then confuse them.

One...
Be crazy. Be strange. Be silly. Be weird. Be unique
Be whatever that makes you happy.
Because life is too short to be anything but happy.

Two ...

Never trashy ..
Always keep it classy..
With a little bit nasty

Three...

Boy 2 mom; why my girlfriend loves a rose which dies in a day but doesn't love me when i die 4 her every day
Mom 2 boy; nice one dude!! Post it on Facebook

Four. ...

If a girl says "don't worry about it!
Then you better freaking worry about it