The use of sexist language is something you must also be careful to avoid in
order to be in tune with today's society. There is an excellent section about this
topic in the book Speak Like a Pro by Margaret Bedrosian. A salesman is now
a salesperson. A fireman is now a firefighter. You don't look for a chairman
for a meeting, you look for someone to chair the meeting or a chairperson.
You must be very careful in your use of humor in these sensitive times.
People may fixate on one wrong word and tune you out and/or be offended. You
may personally feel that using a little off-color joke once in awhile is OK, or you
may think that no harm is done in using sexist language whenever you feel like
it. I can assure you that you are wrong when it comes to professional
presentations. Do whatever you want with your friends, but if you persist in any
of these behaviors you will be labeled as "out-of-touch" and largely
unpromotable in virtually every major corporation.