@cootiespie No, Neelix did not date a child, but he was in a relationship with Kes, an Ocampan who was portrayed as younger than Neelix, and some viewers and commentators felt she was too young for him.
@cootiespie They were mail order brides, intended for settlers on Ophiuchus III, who felt they had low or no chance of scoring a husband wherever they hailed from.
The entire Enterprise crew, with the exception of Spock, of course, had a boner for them. Kirk was also afflicted. This was 1966, and they wrote SciFi just like they did westerns.