Oh my gosh! Are you talking about sucking on the end of the gravel vac!?
Don't do it! Don't do it! Don't do it! LOL I understand why you don't want to do that! Yuck! Make it easier on yourself, so you're less likely to put it off.
I did it once with my mouth, and made my husband do it a few times. Than I was determined to do everything on my own when it came to my tanks. That way he can't complain about my MTS.
I'm a female, just a little over five foot, that manages to take care of multiple tanks without a Pithon. I use a 3 gallon bucket that is only used for my fish, and a manual gravel vac. I put the gravel vac in the tank, place the other end between my knees pointed in the bucket. Then I squeeze my infant nasal aspirator, and place it inside the tube that is pointed in the bucket, to do the sucking for me. Sometimes I have to remove it, squeeze, and put it back in to get it going, but my mouth NEVER goes on that thing! You can buy one at any drug store for about a buck or two. If you don't know what I'm talking about, let me know, and I'll post a picture. A turkey baster might work, too. I got my infant nasal aspirator from the hospital after having a baby. They are usually blue, and just look like a blue ball with a pointy edge.
Hope that is some help to you.