Actually this is a common misconception due to the nature of the males forked penis...many old wives tales say this is due to the 'fact' that they procreate through the nostrils. Obviously this is incorrect, but believe me, most vets will freak out if you x-ray an oppossum, and they will drive themselves crazy trying to figure out what the odd 'thing' is inside the opposum.. . Lorinne, wildlife rehabber.