I have always loved really extended sessions of sex, by this I mean in excess of 3 hours or more, nearly 5 hours being my best session ever while I was married.
I never do quickies, a quicky for me is an hour minimum, I am lucky in that I can maintain an erection for as long as it is needed, during a long session I will hold back from cumming, then let it all build back up again, so on and so forth, until the time comes, no pun intended, for me to finish.
This has also carried over into my masturbation sessions, they are now in excess of 2 to 3 hours before I let myself go, so enjoying the build up of pre cum over the actual orgasm in fact.
So the question to anyone reading this post is, how long is too long ?
If foreplay, hugging and caressing each other is part of sex a few hours is not uncommon.
If you include activities you do in bed together playing with each other's bodies naked or scantily dressed, or BDSM as part of sex, we have had sex for over 72 continuous hours when the girls were not at home..
If sex means sexual intercourse, my husband has had his penis inside me actively thrusting for up to half an hour. You can always wait a several minutes and do it again. The genitals aren't the only body parts that need a rest. The arms, legs and torso muscles also welcome an occasional rest. My husband will also say that his neck needs an occasional rest after eating me for prolonged periods. Since I don't consider the time you spend looking into each other's eyes and holding each other as "sex", all the previous times are inaccurate as far as "how long a sex session" is.
In my mind, "how long a sex session" really is, is the time from starting foreplay through the last orgasm. Having intercourse, playing around, then taking a nap or holding each other then doing it again, is NOT the same sex session. I don't think anyone is actively, continuously fucking, masturbating, going down on their partner, or fucking them with toys for three or more continuous non-stop hours without some kind of a break,
Available time is always a consideration.
There is no time that is too long if you are both interested in continuing.
If you never do quickies, you don't know what you are missing. It's great fun to be in the middle of doing something like gardening, watching television or playing tennis and saying, "let's fuck" then doing the deed and going right back to whatever else you were doing.
How long you masturbate for also is largely determined by available time and how many orgasms I can have before my wrist, hands and fingers give out!