How is it racist and sexist?
There's now a stereotype being applied, and you're the one that did it.
Even if you're arguing against it, that's not a positive thing to do.
Edit: grammar and rephrasing to allow for the inclusion of the phrase "beginning to get on my tits".
Whoa there. They launched a rocket, one not even heavier than the 50 year old Saturn V. This is not the most amazing thing that ever happened ever.