There are established mathematical terms which may be construed as to carry sexial or drug/alcohol-related innuendo. Examples:
- 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".