He abused you, gave you VD, and then left you like a dog!

Also, recessive mutations introduced into the genetic pool are subject to processes that tend to eliminate them random elimination, called drift, and selection based on reproductive disadvantage.

57. To address adolescent reproductive health issues, including HIV infection and AIDS, through the promotion of responsible and healthy reproductive and sexual behaviour.

A recessive mutation often has some effect, albeit slight, even when only a single copy has been inherited, so it may result in some reproductive disadvantage.