My hair-tucking had to do with heroines committing the clumsy descriptive device, but I like how you have the hero doing that as an act of tenderness. I've seen that too many times, though!
In the days when I had 80's Big Hair, I never had a guy try it on me, mostly because I'd spent a lot of time getting my hair to look right, and it was held firmly in place by a lot of White Rain Unscented. He'd have just sliced up his fingers!
Style considerations aside, guys are usually more interested in feeling up other areas on a woman besides her hair!
Not to share TMI, but I rather prefer it as well!
For the rest, it can be difficult to write a good nookie scene. The best writers are not afraid to "get naked" on the page and reveal their own
feelings instead of merely writing about actions.
Last year I had a very pivotal to the plot nookie scene to write. It took three weeks to "work up" to it. The MC was in a VERY complicated emotional place, and what should have been a physical release for him turned into a scary emotional turning point. He comes to see himself differently afterwards. I had a series of Post It notes on the desk so I could include all the feelings he would be experiencing.
It worked out well, and he had a different emotional color to him afterward. It was a very subtle color, but I liked writing it, and it influenced his later actions.
The scene, while hot, doesn't have much mention of body parts, nor is it even remotely a "Tab A into Slot B, shake well, have a cigarette" kind of scene. I can spot those a mile off and just skip reading them. Those are a terrible bore! (Writer looks at page count: "Hm, p. 72, time for a nookie-break, next one on p. 81, then I start dinner.)
I prefer scenes where the characters are engaging me emotionally, and that absolutely should be show not tell. Telling the reader a guy is growling with passion (or grunting, snarling, or groaning like a lowland gorilla in heat) is a turn off.
Showing the reader his emotions is much better.
The BEST scene of passion I ever read wasn't even a nookie scene. I was in the middle of
Proof, by Dick Francis. The MC is a grieving widower in great emotional pain. There's one line, just ONE line, where he walks past the bedroom where "my wife and I made love" is so wistful, so full of pain that I had to stop reading and have a good blub. That one line gave me an instant mental montage of all the joys he and his wife shared in their private world--gone now.
Francis built up to that line throughout the book. With every mention of grief, the hero's self-doubts, the stress put on him by the mystery, and brushes with death, I was so caught up that I felt he was a friend in pain and I had to commiserate.
Of course, Dick Francis writes some very wonderful love scenes and certainly I learned a lot from him. His heroes are singularly free of grunting and groaning and are wholly focused on the lady. He feels lucky to be with her, he makes it
fun! Even when she comes with emotional baggage, he's patient, waiting until she's worked things through and is ready to commit, because she's worth it. Then he makes it worth
her while.
And through all the books he's written, it's clear that the writer was very, VERY much in love with his wife.
Wow.
when typing that 
