I would take extreme caution against saying “not infectious” and rather say not infectious. Blood borne illnesses are contagious even when a person is asymptomatic, including HIV, Hepatitis, and others.
Ebola spread through sex when soldiers and a prostitute were asymptomatic. Given the possibility of someone having sexual contact with others over the days of time in which they take to start showing symptoms or even develop a fever, it technically is possible, though not through as many channels as if they were symptomatic.
“Ebola spread through sex when soldiers and a prostitute were asymptomatic”
I cannot find a good reason for why it does not transmit till a person is showing symptoms. Perhaps we don’t know?
Interesting that they say the semen and breast milk can transmit the disease even after the victim has recovered.