"Later," he whispered, brushing her lower lip with the side of his thumb.

The side of his thumb was bleeding, cut by the cylinder latch.

He nodded and chewed at the side of his thumb.

When thinking hard, he rubbed the older of the two scars with the side of his right thumb.

He nervously chewed the skin on the side of his thumb.

Adolfo lowered the side of his thumb onto the bottom button.

She started to whimper and bit the side of her thumb to keep from being heard.

A small gash on the side of my thumb was welling blood.

I stood, fretting and chewing the side of my thumb.

I jumped, and the blade jabbed deep into the side of my thumb.