Actually some say animals can consent, regardless animals are property and therefor consent is not needed; animal consent is only a straw man for your perversion.
I do not think children are able to give informed consent
First of all Informed consent is only needed for medical procedures, yet another straw man for justifying your perversion. Simple consent is all that is needed for sex, or in your case sodomy. Second, science says some children have the mental capacity to give consent and it’s hypocritical to deny them their rights when capable of meeting that burden.
And I guess you have to give relatives a pass, right?
Wow. The link in the above was one of the sickest I have seen in a long time. However, I have no doubt that an animal can give consent to animal-like behavior. Beastiality is a great example of what is wrong with the pure liberatarianism.