A happy Sloth.

Guy with big fat had shows a thumbs up

A guy holding HAD is being thumbs-up'ed by a severed hand/

your dad's wedding night

a doctor examines alice from resident evil in that tube while rubbing one out through his coat pocket

Barney the dinosaur has impure thoughts.

Barney thinks dirty thoughts about the kids he plays with.

"light up the night" happens to refer to a whole bunch of stuff according to Google, so...