Is this a lie, or, how much information do you really want?

Let’s say I have a friend who had an embarrassing but non-serious problem that made her unable to have sex, like a yeast infection. She was, at the same time, extremely swamped with work and on a very tight deadline.

She told her boyfriend she couldn’t have sex because of all the work. Later he found out about the yeast infection, and jokingly (but a little seriously) said she had lied about the reason she couldn’t have sex.

Is this a lie?

Also, dudes, would you prefer to know about the yeast infection, or be protected from this information?