Differences between phrases by adding se

Question

What are the differences between these two phrases?

• Hemos comprado un yate.
  • Nos hemos comprado un yate. /
  • Pedro vino solo a Madrid.
  • Pedro se vino solo a Madrid. /
  • Como un filete en cada comida.
  • Me como un fielte en cada comida. /
  • Ese señor fuma dos puros diarios.
  • Ese señor se fuma dos puros diarios. /
  • Esperó una hora por él.
  • Se esperó una hora por él. /
  • El domingo bebiste una botella de vino.
  • El domingo te bebiste una botella de vino.

Answer 1

Most of the time, reflexive pronouns used with verbs that don't usually take reflexive pronouns reflect some kind of idiomatic expression or at least a change in connotation.

For example:

•Como un filete en cada comida - I eat a filet every morning •Me como un fielte en cada comida - I scarf up a filet every morning!

•El domingo bebiste una botella de vino - On Sunday you drank a bottle of wine. •El domingo te bebiste una botella de vino - On Sunday you drank up a whole bottle of wine.

•Hemos comprado un yate - We've bought a yacht. •Nos hemos comprado un yate - We've bought ourselves a yacht!

Something like that...

Answer 2

As far as I'm concerned, in each case the second sentence says the same thing as the first one.

For instance:

Hemos comprado un yate: We have bought a yacht.

Nos hemos comprado un yate: We have bought ourselves a yacht.

Ok, the second sentence directly states what is only implied by the first. But they both mean the same thing.