You've traveled thousands of light years to a distant, watery planet third in orbit around an unremarkable yellow star. You've got a faster-than-light spaceship powered by a few dozen suns in its belly. You've got weapons that can stun, kill, or vaporize the vermin occupying the planet. You've got a teleportation system that can take you apart and put you back together thousands of miles away.
Why are you nekkid?