When a guy places and then thrusts his dick (hot dog) between a chick's ass cheeks (buns) - similar to titty fucking) - there is no penetration; just add mayo (cum); works best when the chick has a lot of "junk in the trunk"
How many guys have been Hot-Dogging with Kim Kardashian?
When a guy fucks a woman without wearing a rubber (barebacking) so that when he unloads his semen (cum) into her pussy, she will become happy or happier; semen can also be unloaded down her throat to produce the happiness feeling
* Scientifically studied *
Lisa: (in a sad tone) I need your happy juice!
MOCO: Semen Therapy on the way!
Lisa: (after MOCO's explosion; in a happy tone) Thanks, I sure needed that!