So I assumed wrong. I assume my own life experiences filtered through then – my apologies.

Of course any discussion about popularity of and reasons for marriage over the last century or so is "heteronormative", for obvious reasons. Still I think men and women experience sex differently, even beyond individual needs. I have several gay friends, but I can't really tell whether any differences they have in sexual needs would be amplified if they were a different gender, potentially influenced by different biological needs.