These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: A Funny Thing Happened on the Way to the Forum
Ho Yay: Tons of it between Pseudolus and Hysterium, and also some later in the show between Hysterium and everyone, due to the cross-dressing hijinks.
Also Pseudolus and Hysterium sing a reprise of "Lovely," which was originally the young (heterosexual) lovers' falling-in-love song. At first it's just Pseudolus trying to convince Hysterium to go along with the crossdressing thing, but then Hysterium starts really getting into it and the Ho Yay skyrockets from there.