Okay, I'm usually not one who likes when MC's end up having sexual "lessons," but the way these two did it?? Definitely yummy.  
Seb was without a doubt such a gentleman to Larkin, always making sure he was comfortable with whatever they were doing. But at the same time, he was just so perfectly sensual, which made him such a GREAT match for Larkin. Sure, Larkin was a tiny bit dense about realizing his growing feelings for Seb, but honestly, that only added to his adorable charm.

I think maybe about 200 pages in I felt so sad for Seb, because he liked Larkin for so long, and this whole "fuckletics instructor" was really putting such a strain on his heart :(