A somewhat common occurrence is for the orings keeping the oil out of your spark plug wells, on your Honda, to fail.

There are orings in the valve cover, but also the ones I've seen fail most are actually under the holders for the rocker arms. Fortunately the fix is not super difficult and can be done with some very basic tools.

You'll need the following:

10mm Socket
12mm Socket
91302PJ7003 x 1
91301PJ7000 x 3
Valve Cover Gasket Set (I prefer FelPro VS50326R1)

Some gasket sets do come with the orings for under the rocker arm holders, but I've seen a couple where it's missing the figure 8 ring, and just comes with 4 regular Orings, so I spend the money on the proper part from Honda.

I'd also recommend an oil change after as you're bound to get some debris and particles in there with the valve cover off.