I tried to pass on commenting, but can’t resist.
As mentioned in the Bliss comments Bud Fisher‘s Mutt and Jeff have been doing the same bed thing for 100 years. The 1922 Cupples and Leon book Mutt and Jeff Book 8, reprinting earlier daily comic strips, featured this strip (by Ed Mack?):
A few years later, in the same series, the situation was cover featured.
Yes, at various times they were shown with wives, but Mutt and Jeff sharing a bed was a regular occurrence throughout the 76 year run of the comic strip. Here is Al Smith (under Fisher’s signature) continuing the tradition (as rerun on the September 8, 2013 GoComics page):
Even before the 1907 debut of Mr. A. Mutt there was Lucy And Sophie Say Goodbye. Lucy And Sophie Say Goodbye was a 1905 comic strip series for The Chicago Tribune by an unknown creator. Every episode featured two young ladies saying goodbye with a passionate kiss and the attendant pandemonium, and occasional indignation, the act caused.
The series can be read at the Digital Comic Museum.
So this “same sex” thing has been going on in syndicated comic strips and family newspapers since at least the early 20th Century.