Unfulfilling gay nuclear family model
I got the impression that when Joni and Laser were drawn to find who their biological father is they were drawn to feel what is it like in having a father figure as well. They wanted to experience it.
The example is when both Julia and Nic think that Lazer is gay by hanging with Clay, who they know is up to no good as a friend. Paul was able to tell that to Laser by hanging with Clay for a few hours. Paul didnt think Laser was gay because he understands the male bro friends mentality. He is just a male figure hanging with his kid but Clay doesnt feel out of place if Lazer would have brought one of his moms to make the skating video.
I feel that when if you have both a boy and a girl as kids its better to have both perspectives of a mother and a father give the kids the fullest upbringing possible. Both gay dads and mothers are able to raise their kids but there are certain things that a dad or a mom not know just because its two different sexes.
Single parent families that are missing mother/father figure. In those cases its known that the kids are missing the input of the other parent. I feel that in the movie it outlines that you can have two same sex parents and the kids would turn alright but its not enough.