"Squeeze! squeeze! squeeze! all the morning long; I squeezed that sperm till I myself almost melted into it; I squeezed that sperm till a strange sort of insanity came over me; and I found myself unwittingly squeezing my co-laborers’ hands in it, mistaking their hands for the gentle globules. Such an abounding, affectionate, friendly, loving feeling did this avocation beget; that at last I was continually squeezing their hands, and looking up into their eyes sentimentally; as much as to say,- Oh! my dear fellow beings, why should we longer cherish any social acerbities, or know the slightest ill-humor or envy! Come; let us squeeze hands all round; nay, let us all squeeze ourselves into each other; let us squeeze ourselves universally into the very milk and sperm of kindness."
http://etc.usf.edu/lit2go/42/moby-dick/775/chapter-94-a-sque...
Moby Dick has a ton of homoerotic scenes like the man donning the whale's penis skin as a robe, or the various bed-sharing scenes with Ishmael and Queequeg including gems like "Queequeg now and then affectionately throwing his brown tattooed legs over mine, and then drawing them back; so entirely sociable and free and easy we were," and "Queequeg's arm thrown over me in the most loving and affectionate manner."
The passage linked-to above doesn't appear sexual to me, but rather a reflection of the affection a person can feel for his fellows, and the (non-sexual) sensual joys that exist in this world.
While Moby Dick was slightly more subtle, Billy Budd and Melville's letters to Hawthorne and are even more heavily loaded with homoeroticism than Moby Dick. Homosexuality isn't a new thing.
But let's not forget that until recently heating was extremely primitive, houses had almost no insulation, and European winters seem to have been colder and longer-lasting.
Staying warm and dry was a real problem, and it wasn't unusual for families and sometimes friends to share a bed because of it.
There's probably a PhD waiting for someone who can write up a thorough survey of the effects of improved heating and lighting on relationships and sexuality.
Could be right, could be wrong, but the gp seemed to be dismissing even the possibility out of hand.