Would students feel uncomfortable if I include in my lecture a quote which is somewhat sexually suggestive? In my lecture, I am thinking of using a famous quote by Winston S. Churchill:


  A good speech should be like a woman's skirt;
  long enough to cover the subject and short enough to create interest.


I like this quote because it clearly expresses the idea that
while you should go over the important details in your speech,
your speech should not be overly detailed.

However, I don't know if some of the students may feel uncomfortable
if I use this quote in class.

Question:
Should I play safe and avoid using this quote in class,
in case some students are offended?

What I decided to do

Although the Churchill quote is quite memorable,
I agree with the answer which says:


  Whether you actually believe that or not, telling that joke gives students the impression that you do. That perception makes the classroom environment more unpleasant for a female student and less conducive to learning.


I will find another way to express my idea without the quote.

In response to comments

Several commenters have pointed out that:


  My general advice is if you need to ask someone else if it is appropriate, you already know you will get into trouble.


That is good advice.
I had a "gut feeling" that it was not a good idea to use this quote;
partly I asked this question because I wanted to understand
why it was not a good idea.
Avoid, but not for that reason.

Sometimes it is a teacher's duty to do things that may offend members of their class. A biology teacher who avoids the subject of evolution for fear of offending creationists is not doing their job, and there are plenty of other examples. The problem here is not that the joke could offend; it's that it gets in the way of learning. 

It treats women as eye candy rather than as thinking beings, implying that a woman's clothing should be chosen for the benefit of male onlookers rather than according to her own priorities. 

Whether you actually believe that or not, telling that joke gives students the impression that you do. That perception makes the classroom environment more unpleasant for a female student and less conducive to learning.

Humour has a place in teaching. Used judiciously, it can help hold the audience's interest and keep them engaged. But for your female students, at least, this particular joke is unlikely to serve that purpose. There are plenty of other ways to say it.