Lukas Gage says the gayest thing about him is he married a man on TV ... while the straightest thing about him is he still hooks up with ladies!

The actor made the shocking admission on an episode of the "In Your Dreams With Owen Thiele" podcast ... telling Owen about the time a radio show host asked how gay he actually was.

Check out the clip ... Gage says he mentioned his wedding to celebrity stylist Chris Appleton on an episode of "The Kardashians" to prove to the host he's defintely not a straight bro though he tells Thiele he doesn't think he's 100% gay either.

Lukas says, "I'm like 10% straight or 10% bi" ... to which Owen asks if he's hooked up with a girl. LG says not just one, but many girls -- adding he still likes to get down with a lady every so often. Gallery

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