Well in Elogium, in season two, 2 episodes before her 2nd birthday in Twisted where Neelix was Jealously ranting about how he thought that Kes was sleeping with other people, Kes says that she is far too young to have a baby.
That might not mean that she is too young to sex for fun, or it might mean that she hasn't had some alien puberty where she is capable of having babies, or it might mean that if she bones too young, she will get preggers, and the baby kill her coming out, which is almost what happened.
The other thing about Twisted, is that that's the episode where we find out that Kes and Neelix have separate bedrooms. If they are not living together, they are not sleeping together.
One episode later Tom fights Neelix to the Death, nearly, for Kes.
Would Tom have done that, killed a dude, for a PG relationship of hugs and handholding?
That episode makes no sense.
"FRIENDS! LISTEN TO ME CLEARLY! MY PLATONIC FRIENDSHIP WITH NEEELIX IS MORE IMPORTANT THAN ANY OF MY FUTURE ORGASMS! HAZAH!"
Which is right up there with "B'Elanna! I know that you are being murdered by a vulcan sex virus and the only thing that will save you from certain death is my penis, I know my penis is the cure, but I don't want to sleep with you right now, becuase I don't think it will be a healthy start to what I suspect is going to be an awesome relationship if you don't die from this Vulcan sex virus, that my penis is totally the cure to. I'm keeping my trousers zipped up, for us... We still cool?"
Is Tom Paris gay?