Well homosexuality sure ain't artificial, it is not created in a calculated attempt by humans, it just happens. It just happens like having a birth mark, it has always happened for millennia.
What you could say is that it is abnormal or atypical, but it is certainly naturally occurring within the human condition.
PS: if she disapproves of her "unnatural" grandson so much leave her alone and forgotten, that is what anyone deserves for being so belittling.
PPS: make some black friends and bring them over to your Gran's house, make sure they are wearing cargo pants with big pockets, making many excuses to walk around the house unescorted. Your gran may be racist in private but she'll fold face-to-face.
What you could say is that it is abnormal or atypical, but it is certainly naturally occurring within the human condition.
PS: if she disapproves of her "unnatural" grandson so much leave her alone and forgotten, that is what anyone deserves for being so belittling.
PPS: make some black friends and bring them over to your Gran's house, make sure they are wearing cargo pants with big pockets, making many excuses to walk around the house unescorted. Your gran may be racist in private but she'll fold face-to-face.