You need a new headlight bulb or windscreen wiper for your car. You know you'll struggle to fit it so you'll send your wife to the shop because it's ok for a woman to ask them to fit it.
Or you need a spare part at a DIY.. store but don't know it's real name. Much easier to send her in to ask for one of these thingamajigs that fits on a wotyamacallit.
I remember hitchhiking with a girlfriend and sitting inconspicuously while she stood out on the shoulder of the road with her thumb out. LOL
I definitely have my wife get her own windshield wipers from the auto parts store so that she can have the guy find the right ones, then ask him if he knows how to install them.
We also have a guy come out every once in a while to help with our landscaping and drip irrigation. I have my wife deal with him because he seems much more inclined to take direction from her than me.
Your question did give me humorous images of a woman getting a guy to help her by acting all helpless and frail.