My wife wears her hair in this style (bob with longer sides) now, and I absolutely LOVE it (although I do miss the days when she had her hair to her ass - my ideal length).

We have developed a way to use her long bob in our foreplay, before any penetration, which I have really come to enjoy. She absolutely loves to have the back of her neck kissed, which I do standing behind her. And with the shorter length behind compared to the sides, I have access to the bottom of her neck. And kissing her there means my face is right in her thick bob, feeling its softness and enjoying the scent. To be able to kiss her higher on her neck, I will occasionally gather her hair in a bun-hold on her head, which I then love to let loose after a while and feel it fall over my face. She likes to feel me getting aroused and hard just enjoying these simple actions, and will taunt me by rubbing her ass against my hard-on. This is the signal for me to take both my hands, reach around her and start caressing her boobs and nipples, all the time with my face still in her hair as I continue planting kisses on her neck, while she leans her head into my face, and starts moving her head gently up and down, left and right, continuously brushing her hair against my face. And as her nipples get aroused and hard, the finale of this particular foreplay – she likes to lick and suck on her own hardened nipples, which she will do by dropping her head onto them, and the longer part of her bob on the sides will follow and fall onto her breasts as she works on the nipples. That in itself is truly one of the most erotic things I have EVER seen.