Well the first joke is about how gay people sometimes say stuff like "I knew I was gay at age 3" so the punchline would be like "what the hell? What kind of baby wants anal sex when they're three years old."
Another joke is about gaydar, and how it's not like radar, because radar uses radio waves, whereas gaydar you're basically looking at a guy and thinking "huh he looks gay". Then I guess i'd go on about how it's not necessary these days because you can just ask if someone is gay and they'll tell you, amd how you can't even use gaydar long range because it starts to tap out at around 50 meters or so, stuff like that.