Dogs may put their paws on you for a number of reasons, the most likely being: to get your attention, affection or they're hoping to get a treat in return.
You've given your dog a treat but instead of eating it, they've buried it down the sofa, why? This is an instinctual behaviour in dogs that is perfectly normal.
Some dogs like being stroked and some do not. If your pooch revels in affection it is likely due to a desire for comfort, stress relief and connection.