I've found two I categorise as having a degree of 'humour'

 I expected to find more. Need to keep looking OR to redefine my definition.

So this was my starting point:

Just found this one, perhaps the breast is looking into the space.

And here are two early ones with Penny in which I am consciously attempting to be funny and clever by playing with juxtaposing eye, breast and nipple. I think in about 2013. Is this humour?

These last two early drawings remind me that some years after I produced them I came across the work of Hans Bellmer and discovered similarities in the extraordinary and provocative superimposing of key anatomical parts. Here are one or two examples from his prolific output:

This is a self portrait.