What would make a mature neutered male cat suddenly squat and wet on my bed 2 times in a week?
Take him to the vet, he might have a urinary tract infection. its common in male cats and can kill them if left untreated. my last two cats died of this.
has something changed about your schedule that might "upset" your cat?
Marking territory, feelings of abandonment, age, laziness.
it depends if hes fixed or not fixed if he is fixed take him to the vet if hes not fixed hes probably spraying you should consider making him a outside cat or get him fixed