2. Put the condom under your tongue, get it nice and slimy. Then pop it to the roof of your mouth, and use suction to open it.

3. Insert tube. Use teeth to slip condom over tube. (If this is a KT88, you might want to hire a really fat, Mexican prostitute for this job.)

4. Insert into amp and let the saliva burn off, then hit the standby switch. Enjoy.

Conventional tube condoms only last a few days, so you'll need to develop those tongue muscles for continuous production.