I think there’s more to it than this. In my experience, sapphic sex is less focussed around orgasm, which means there’s often periods where the sex/making out is sort of enjoying the good vibes (no pun intended).

In contrast, men that I have slept with can become overly fixated on the idea of me orgasming, which always annoys me because I’m quite difficult to bring to orgasm, and they don’t seem to get that orgasm != good sex (they’re certainly correlated ofc, but one doesn’t necessarily mean the other).

Women also tend to take much longer to reach orgasm, which can mean that sapphic sex tends to be quite dynamic in terms of positions, tempo, use of toys etc… Like, if I’m going down on a partner who can only orgasm through oral sex, and I know that the position I’m in will start causing me pain before she’s anywhere near orgasming, then I might opt to switch things up to be in a position that’s restful for me (so I can resume oral afterwards) but still stimulating for my partner.

TL;DR: I think the biochemical wakefulness can’t hurt, but I think sapphic sex going on for hours is mostly sociocultural