This site as well as anapsid.org have info on male mating season. I would read the info on the love dolls.. its a way for them to get their rocks off and it sometimes helps.
The mention of animal products does concern me though. A lot actually. their bodies cannot break down and use animal proteins.. it stresses renal functions until eventually causing renal failure. When this happens they can also turn orange and sick iguanas tend to be quite aggressive. Your iguana needs to see a herp vet and stop feeding it rats.. purely vegan only diets.