The law does not stat directly regarding the wearing of these
t-shirts.
However, offences regarding sedition, insult of modesty, public
nuisance etc will come into place. Generally it should be ok if
someone wear the shirts for fun. However, alot really depends on
the situation etc.
eg. Insult of modesty: Let's say a guy wears a shirt that is
sexually suggestive or offensive, girls may find it offensive, but
this alone may not be enough to justify insult of modesty. However,
if the guy gets into a conversation with a girl and make reference
to his shirt, he may get into trouble if the girl decides to
complain. However, like i said, i really depends on the specific
situation and what the judge thinks.
Same for sedition, public nuisance all that.
So best is don't try to be funny lar...
why be rebellious and make a nuisance of yourself in society.
