Yeahh, it gets too much for me sometimes too. Especially when I'm spilling all over the place and having to suck tubes to siphon. A mouth full of tank water doesn't usually go down well...
It is easy to not have to do the sucking just full the whole syphon with water in the tank and then block the end you will be putting into a bucket/sink and then make sure that once that end is out you have sealed it with your thumb. Then place it at a lower level that the head still inside the tank and let it run and it will go without you having to suck on it :3