yes, romantic love. it sounds like you haven’t known any homosexual couples, but they certainly have the same love for one another as heterosexual couples do as well as all the same problems that heterosexual relationships can have. these problems will of course occur in different statistical frequencies between the two groups.
just like homosexuals, heterosexuals of course frequently have such “open relationships” as well, so in that sense, yes, they are equal even in this regard too.
if you think that there ought to be a law criminalizing sex outside of marriage (it might be possible to convince me that there should be such a law) it would apply just as easily to homosexuals as heterosexuals. but there is no such law today. such a law would perhaps do much to protect the sanctity of marriage as a monogamous ideally life-long bond and children who are raised by married couples. i can’t see how preventing more homosexuals from marrying could do anything to keep people from philandering and divorcing at such high rates as we see today. what problems there are with the institution of marriage proportionately apply mostly to heterosexuals since they constitute the vast majority of marriages.
(i heard of a case recently where a woman sued another woman for having sex with her husband and breaking up her marriage. i never heard the outcome or if it has been resolved. if it becomes possible to seek damages against people who have sex with married people, that may be a way to reduce the incidence of adultery.)
rocinante