Sassy - may be you can type with your eyes closed so that your brain doesn't see what the fingers are typing. Maybe you can trick it that way!!
Or may be I am just being stupid because then your messages would look like this:

afhbfds ajl gfsjklfs fdsk jks ajaj ash fds gfd sa ghd ghj ukdsfk kl dsa ujk fsdsa gobideegook

Seriously though - hope it works.