Something that I'm sure we've all seen: Husband drives to a place where he will get out, wife in passenger's seat. Husband gets out of drivers seat, wife gets in to drive home. Wife has to adjust seat, mirrors, etc.
To me this is the husband saying "I trust you to drive my car but not when I'm in it. Even when it makes sense." And I won't go into the holdups it can cause whenever this occurs on a busy street etc.
OK, as sexism goes this is relatively minor but it is also purely stupid. And I'm not sure if its the sexism or the stupidity that annoys me more.