He had to fight to keep his lips and hands from moving on down her body, or even to pull them away.

He did not resist, but kept his lips moving as if talking to himself.

He kept his lips against hers for quite a while.

I kept our lips together for another minute, then finally backed away.

This time I was careful to keep my lips closed.

"How long are we supposed to keep our lips pressed together?"

She was trying hard to keep her lips from quivering.

But is that enough to keep your lips safe, or do they need extra protection?

There's only so long you can keep a stiff upper lip.

So she kept her lips firmly shut, and went on with life as usual.