True, some sex before would be ideal, but even with a previous intercourse if you're not born with little talent you need more practice.
But I'd come up with a counterexample.The viagra scene, it would have been normal for Dylan to come very quickly. What I mean is that neither he nor Sam immediately comes in their pants when they see a naked woman.
Plus, the foot massage scene, Dylan showed that he can control himself and that his intention is to give pleasure in the first place.
Well, that scene with Dylan & his prolonged erection was another example of realism taking a break. I began to feel impatient, along with Sophia, that he was taking so long to reach a climax. I started to think he must have been studying with a master of tantric sex, or perhaps that viagra had been a bad batch. Speaking of which, my guess is that however fast the lads can 'get back up,' it's going to be the third attempt at least before they can have anything like the self-control to fulfil theirs & Sophia's desires.
My point about Sophia looking odd was not explicit enough, because any delays could be a time to have second thoughts about exactly what the hell she thinks she's doing, especially in Dylan's case. What feels like eons ago, I wrote a scenario where Sophia could have sex with Dylan to comfort him as a result of him being broken-hearted after breaking up with his first girlfriend &/or first love. Despite the distaste of some for consolation sex, I still see this as the most realistic option with her own son & it would be a once only event & secret between them.
Presumably Dylan & Sam know enough to use their fap material to indulge in preparatory masturbation as a means to avoid premature ejaculation. This could help, if it occurred a few hours or a day, before they shagged Sophia. They would, however, have to know what was "coming" (pun intended), which would cancel any story of spontaneous passion. IMO that's the only way Sam is ever going to get lucky, unless Sophia actually tells him when & where they're going to have sex & I can't see that happening, unless she has become the "whore" most of us don't want to see.
It becomes too technical after a while, all this speculation about the mechanics of a successful sexual encounter. It's a real passion killer! Sophia should talk to Liam & get him to practice some orgasm delaying techniques. At Liam's age he should have read up on these, or at least got some advice but obviously he hasn't & Sophia probably finds it too difficult a subject to bring up. An adult man bragging about lasting six minutes was another departure from realism BUT this is where I came in.