It is unknown what he thought of his girlfriend sleeping and getting pregnant with Critter's child since there is no mention of them breaking up. Horny Dave had a vasectomy in 1995, and Mudflap was heavily pregnant by the time Horny Dave died. Nobody knew the baby's real father until Mudflap revealed it after giving birth.
The banner above his casket in "Ear-sy Rider" stated, "R.I.P. HORNY DAVE GOD GAVE YOU A HALO CUZ HE COULDN'T MAKE YOU WEAR A HELMET."
His favorite song is over 21 minutes long. It was played at his funeral. ("Ear-sy Rider")