From platypuses with their 10 sex chromosomes and milk-sweating skin, ... Each of the four tips is capable of delivering sperm as well as urine, but ...
source https://www.google.com/url?rct=j&sa=t&url=https://www.iflscience.com/plants-and-animals/echidnas-have-a-fourtipped-penis-but-only-use-half-of-it-at-once/&ct=ga&cd=CAIyHGQ3ZjU4NDljNDFhNmE2ZTY6Y28uaW46ZW46SU4&usg=AFQjCNFcxfjvU2VwDmAqSq9wCS6rFuU_4g
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