I am 46 yr old male. I was in a marriage for 28 1/2 yrs. me and my wife had sex maybe once or twice a week. I recently met someone new. we have been sexually active and only skipping one or two days between. for the last 3 months. my concern is that the last couple times, I have not been as hard,. or have not been able to even get hard. even after foreplay. Just concerned about low "T". Prostate problems. Or is it just that I am not used to this much sex. and need to take more breaks?