An observation. Attaining and maintaining an erection is both psychological and physiological. Both contribute to performance. Especially in one's 60's, it's worth checking in with your personal physician to make sure that the physiological side is optimized, such as testosterone levels.
Male performance
If the couple has any decency they just act like nothing is going on and after a bit just conclude the play. There's no point in prolonging a guys embaressment. (the longer you try and fail the more difficult it becomes) Sometimes just put your clothes back on and sit and chat about the weather for awhile. Sort of a reset button. Maybe after a bit of small talk and a couple more drinks the guy will settle down. I would highly encourage anyone that has the concern that they might not be able to perform to take a pill prior to play. They are all over ebay and other places and can be a mans best friend when it comes to sex.
I have had a few situations where my ability to drink beer has overtaken my ability to do much else. It sucks but it happens to everyone at some point in time. Weve had a couple guys over to the house for play that the nervousness got the better of them. There are pills out there that help TREMENDOUSLY with this.
Is there been a time with anyone in which you were not able to get and/or maintain an erection? Especially, if you are a new single male with one or more mf couples. If so, what (if anything) was done and how did they react? I would think a person would have to be extremely nervous, especially if the husband was participating or worse not participating and is in the room being the watchful eye.