Maybe she has a condition and intercourse is painful for her therefore she doesn't enjoy it. There's a condition where the muscles down there lock up which means that your little buddy causes hot searing pain every time you two do the deed.

Take it as an indication that you need to step up your game!

Perhaps OP's wife is asexual.

A couple possible reasons: She works full time and comes home exhausted, they have an infant or toddlers running around the house.

That's shady? I've not heard that term used for this situation before!

Sorry buddy, that just sucks for just you apparently.

You must not be good in bed, for her to be so happy.

You really need to talk about that.

Maybe she just hates motorcycles and thinks if anything is going to get you to give it up, it's this...

Your wife must be overworked. ;P Might have to tone it down.