I know most people are going to freak when they know what method I use for starting a siphon, but it works. I use a stainless steel racking cane, clip for the neck of the carboy, and suck on the hose to start the siphon. Let it drain, initially, into a bucket, close off the clip on the tubing. Then let the end of the tubing sit in sanitizer for a couple minutes. Then when I'm ready to rack into the keg or secondary, just unclip and go. I'm surprised not more people use this method.It's rare, but when the wort doesn't flow from my kettle through the CFC (full of sanitizer) I suck start it and stick it in some sanitizer for a few seconds while the sanitizer empties from the CFC. But I don't put my mouth directly on the hose, I dip my hand in starsan, wrap my hand around the hose tightly, and put my mouth on my hand. It works fine, as long as you don't need to much suction to get it going.
I think people are more paranoid than they need to be. I don't think sucking on the hose is a problem, then dipping the end in sanitizer for a bit. It's not like you're blowing bacteria back up into the tube and into the beer.