since so many people don't seem to know, Tony Stark is indeed attracted to men and very much not straight, a thread:

hard evidence:

he opens a dating profile and sets his preferences to women AND men

he has slept with men

when tony is trapped in the dreamvision which shows his fears and desires by ty stone, who is surrounded by tonys exes...some of which are men

soft evidence:

the flirting

the flirting part 2 (though I suppose flirting isn't the right word)

continued

more flirting

it just keeps going

now this is when an editor left a note saying "geez he's a better roll than Ru!" implicating ty was better in bed than tonys current gf rumiko

Now this isn't evidence AT ALL but the world should know tony stark gets pegged

Then for the disclaimer: a lot of these panels are ones that I've saved over the years and I can't remember which issue each one came from but if you're very curious a reverse image search should pull them up