How come after liposuction you have to wear a garment?

I had liposuction of the love handles and lower abdomen done 11 days ago and am just wondering why i wear this garment i know they went over it but i cant remember!! And how long before i can have sex?

A compression garment is very common after liposuction surgery. Right after your liposuction procedure, your skin is slightly too loose, due the fat which has just been extracted underneath the skin level. Your skin needs to tighten and heal to the underlying soft tissue. A compression garment puts pressure on the skin and soft tissue so that it can heal together and form less scar tissue and a better contour underneath.