Women are much more discriminating than men. S1 is 6’1", decent looking, decent job, fit and active, charming … and involuntarily single. After he and his long-term gf broke up she found a new guy almost immediately. He is struggling with finding the time and emotional resilience to put in the work and go meet women his age.
One of his roommates in college was about the same except looked like a Hollister model. Women would show up in the middle of the night knocking on his door asking for sex. He matched with probably 90% of the women on Tinder. For these top 1% attractiveness guys, life is very different. For an average looking guy Tinder does not work at all.
There is a growing trend of guys voluntarily withdrawing from the dating pool with the idea that prostitutes are cheaper than girlfriends and do not require an emotional investment. Plus they have no worries over unwanted pregnancies or getting MeToo notoriety. They refer to themselves as MGTOW - Men Going Their Own Way.
My wife in healthcare says I would be surprised at the number of couples who do not have sex. To me, that is a divide by zero error. I was under the assumption that physical intimacy was hard-wired. Guess not.
Link to one of the studies about the imbalance: http://psycnet.apa.org/record/2008-14626-002