DEAR LESLIE, With the Smiths in the headlines recently, I’m wondering is a life partnership the key to a successful marriage, but most importantly, what does a life partnership look like to today’s couple? – Asking for a friend Dear Asking for a Friend.., Firstly, I want to applaud Will and Jada Pinkett Smith for their successful marriage, life partnership, and willingness to be brutally honest with each other as to what works and what…