I think the punchline is that workplace romance usually gets both parties fired, regardless of who initiated. Hence, doing "things" with the pickle slicer means the pickle slicer gets fired for participating...

They're both misdirection jokes.

The first one sounds like the dad was replaced by computers. But then reveals the dad is a sex worker and being replaced by sex toys.

The second one sounds like the person was being intimate with dangerous kitchen equipment, then reveals that a "pickle slicer" is a job for a human and not a machine.