There are established mathematical terms which may be construed as to carry sexial or drug/alcohol-related innuendo. Examples:
[CENSORED]
- handlebody
- pipe dream
- drunkard's walk
- perverse sheaf
- Tits alternative
- hairy ball theorem
Should MO start censoring these and similar established terms, too? IMHO, word play in some of the cited in the question jokes is quite similar, e.g. "Moebius stripper".
PS. I do not advocate lewd jokes, I merely want to point out that we are on a slippery slope in this thread.
PPS. Deleting several years-old answers is an attempt to rewrite history; I'd rather see these answers commented as "examples of inconsistent application of website policies, disapproved". Or perhaps screened away as "sensitive/offensive content", so that an extra click is needed to see them.
I discussed this question with a female CS professor, and her remark was that MO should not resemble a male sauna in its tone. That is to say, an overload of these sort of jokes might be too much for some to bear.