It's like replacing your dick with an artificial dildo which can inseminate a woman with little to no input from you
no accidental impregnations as you would be able to setup it to not to ejaculate even if you have sex for hours, no diseases, no fatigue 
What's the catch?
For all that convenience you have to sacrifice the fun and pleasure you get when you have sex! bye-bye, glorious orgasmic bliss!
1.give up driving.
2. get a dildo and stick it in your arse
3. get in the back
4 bounce up and down on the seat while these f*ckers drive you to the destination.
that will solve the dildo problem.
Ps:-
I personally hate the sh*t out of autonomous driving.