1. it is a wonderful feeling.
2. a thrill to expose her to truck drivers and suv drivers as you go by them.
3. loose your concentration on your still developing driving skills, it is a great way to get your cock bitten off.
from my first GF to my two wives. A good blow job is nice. Its much better to park and fuck them. road side travel pussy is great.
I was a boy and 18 the first time I gave a truck driver a bj.
Have had several girls do this for me. Few get in my lap and ride me while i drive. I fucked my sister in law like this. It bothered me when she got out of the car and kissed my wifes brother. She had sucked a load before I pumped another inside her.
Wife does this for me even made her suck my mate off while he was driving