Male kittens are usually neutered at between 4 to 6 months of age. However, the AVMA has endorsed early age neutering of dogs and cats 8 to 16 weeks of age. You and your vet can decide what is the best time starting in a few weeks.
The use of incense was very common. It was employed for profane purposes as an antidote to the lassitude caused by very great heat, as perfumes are now used. Mention of its introduction into pagan worship is made by classical writers (cf. Ovid, Metamorph., VI, 14, Virgil, AEneid, I, 146).
Historically Ambergris (whale vomit) has been adopted for a number of uses including being used as incense, as an ingredient in cigars to improve their odor, in medicine to help with colds, headaches and other medical conditions, to protect individuals from a plague (the scent of whale vomit was believed to prevent the plague by eliminating the plagues odor which was believed to be the way the plague transferred from person to person) and as an aphrodisiac among other purposes.