Some studies show that when those involved in same sex relationships adopt or via in vitro fertilisation have children the children grow up with issues not common in homes with two parents of the opposite sex. In this case the are broad repercussions to what the two adults consented to.
Sorry, I missed the qualifier "some studies". I have no doubt that some studies show that. Any that might have the signature of the Family Research Institute, American Family Association, the LDS Church , Mark Regnerus, or Paul Cameron aren't going to be taken seriously. I have been debunking these kinds of studies for decades. I will say that while the blatant bias goes unchecked, the style has improved. I'm still stunned when otherwise intelligent people quote them.
If a person wanted to waste the time and money, he could easily prove that heterosexuals should not be having or raising children. Our prisons are full of the children of heterosexual relationships.The other issue with your post was that I was not addressing the validity of the studies on same sex parents. I suspected before you even posted that this would be what you would comment on instead of participating in the larger topic of whether acts between consenting adults have repercussions beyond the consenting parties.