I've seen this done before, but not here. So I thought I'd give it a try.
Change one word from the previous poster's sentence to form a new one.
If it gets too ridiculous to even sense you can start again with a new sentence.

I taught my dog to chase a stick.

You taught my dog to chase a stick?

You taught my dog to chase a mime?

You taught my kid to chase a mime?

You taught my kid to pleasure a mime?

_{>_>.}

Donkeys used my kid to pleasure a mime?

Donkeys used my toothbrush to pleasure a mime?

Donkeys used my tongue to pleasure a mime?

_{Just as planned <_<.}

Donkeys used my tongue to pleasure me...
_{Couldn't think of anything else. XD}

Donkeys used my tongue to pleasure you??!!

Donkeys used my tongue to pleasure Elmo??

Donkeys used my tongue to tickle elmo??

Donkeys used my eyes to tickle elmo??

Donkeys used my eyes to tickle you?

Elmo used your eyes to tickle you?

Elmo used pickled eyes to tickle you?

Elmo used laser eyes to tickle you?

Elmo used laser eyes to kill you?

Cats used laser eyes to kill you?

Cats used laser eyes to hug you?

Cats used laser eyes to hug dogs?

Cats used laser surgery to hug dogs?

Cats used laser surgery to augment dogs?

Cats invented laser surgery to augment dogs?

Cats invented taser surgery to augment dogs.

Cats invented taser therapy to augment dogs.

Cats invented taser therapy to augment Skrillex?

Cats invented taser therapy to resurrect Skrillex?

Daemons invented taser therapy to resurrect Skrillex?

Skrillex invented taser therapy to resurrect Skrillex?

Satan invented dubstep therapy to resurrect Skrillex.