My Sex Professor » erections http://mysexprofessor.com Have Better Sex Wed, 04 Feb 2015 18:25:12 +0000 en-US hourly 1 http://wordpress.org/?v=3.5.1 How to last longer during sex: Do cock rings work? http://mysexprofessor.com/sexual-health/how-to-last-longer-during-sex-do-cock-rings-work/ http://mysexprofessor.com/sexual-health/how-to-last-longer-during-sex-do-cock-rings-work/#comments Wed, 04 Mar 2009 11:00:19 +0000 Dr. Debby Herbenick http://www.mysexprofessor.com/?p=1563 http://mysexprofessor.com/sexual-health/how-to-last-longer-during-sex-do-cock-rings-work/feed/ 6 MSP Q&A: Why can’t I stay hard during sex? What causes erection problems? http://mysexprofessor.com/sexual-health/msp-qa-why-cant-i-stay-hard-during-sex-what-causes-erection-problems/ http://mysexprofessor.com/sexual-health/msp-qa-why-cant-i-stay-hard-during-sex-what-causes-erection-problems/#comments Wed, 28 Jan 2009 11:00:45 +0000 Dr. Debby Herbenick http://www.mysexprofessor.com/?p=1414 http://mysexprofessor.com/sexual-health/msp-qa-why-cant-i-stay-hard-during-sex-what-causes-erection-problems/feed/ 19