@cstross A spacesuit is really the ultimate chastity belt (*), if that's your thing.
And there's surely some significance in the fact that you can't get out of a spacesuit by yourself (**), so there's some mutual dependency stuff going on.
(*) Alternatively, it's the ultimate 'adult diaper', if THAT is your thing.
(**) Unless you're Barbarella, who pioneered the whole 'spacesuit striptease' fetish.
@cstross Oooh, oooh, and I totally forgot the auto-erotic asphyxiation angle as well.
"We found him alone in his hotel room, detective. Wearing a full spacesuit. Now, do you think he was planning to colonize Mars, or was he just having such a good time that he didn't notice when his oxygen ran out?"