When certain moods strike, I love to write the naughty parts in manuscripts.
They always start WAY too long, going through every motion of the encounter and get hacked to pieces. These scenes often research (or merely thought), and not necessarily the "is this position physically possible?" kind (although that happens). Things like if she's 5' 2" and he's 5' 8" does she have to stand on tip toe to kiss him? Can your hand physically bend that way?
The other important part of a love scene is to make sure you edit ALL IN ONE SITTING. Because otherwise, you can miss important details.
For example, I have this:
"Confusion flashed in Zélie’s eyes and her lips parted. She released him, her hand falling to her side. Étienne brought his kiss to her clavicle and then closer to her breast. He spun her..."
Now in the original version that line about her hand falling away was not there, nor was the release. This doesn't seem like a big problem until you realize her hand was in his pants, holding something important for this scene, and he spins her around without letting go.
The reader can assume she let go, but since she's confused, maybe she didn't... and depending, that could be painful or merely lead to some getting twisted up and falling over... You get the idea.
And after you hack the scene down to its essence and have what you like, read it out loud. You may blush, but it's the only way to check how smooth it is.