(This is not Frabbrizio after a bad makeup job but how he actually looks, and it's slightly amusing.)

He seemed to find this slightly amusing.

I actually agree with you - I was aiming for slightly amusing.

Actually, I find all this interest in that particular function slightly amusing.

My father found all of this slightly amusing.

She seems to find it a slightly amusing object.

She found his decor slightly amusing.

That he felt like he needed to mention it, she found slightly amusing.

In my dreams I had thought it slightly amusing; now I did not.

From a historical standpoint, I cannot help but find this slightly amusing.