In men, smoking leads to reduced sperm count and motility, according to the study Smoking and Infertility published in ScienceDirect
Thats all psychopathy (which is different from schizophrenia), where you would expect psychosis, specific delusions and hallucinations that make it impossible for someone to understand right from wrong, and, over time, a cognitive decline
This can increase exposure to nicotine and other harmful substances and reduce the chances of quitting smoking successfully
Future studies are required to clarify if smoking causally leads to such learning deficits or the other way around
A couple smokes won't ruin your car, but it'll make it pretty stale, so just crumple up pieces of newspaper to absorb the smell overnight