Acsending Testicles

  Is it normal for the testicles to "draw up" into the body during sex?  I am 36 years old with no medical problems, but I am concerned that this is unusual.
=================
Thanks Tom for your answer.  
Testicles drawing up into the scrotum is a protective reflex and is totally normal. It is called the cremasteric reflex. The cremasteric muscles contract or relax raising or lowering the testicles within the scrotum.  This is thought to help maintain ideal temperatures within the testicles to facillitate sperm production.
More individualized care is available at the Henry Ford Hospital and its urban campuses by calling  (1 800 653 6568). We can also arrange local accommodations through this number if this is your need. Please bring any physicians