Impaired Vision
A sex therapist was doing research at the local college when one of the male volunteers told him:
- When I get it in part way, my vision blurs. And when I get it all the way in, I can't see a thing.
- Hmmm...that's an interesting optical reaction to sex - said the researcher.
- Would you mind if I had a look at it?
So the volunteer stuck out his tongue!