I cannot imagine being a VP and engaging in this behavior, even if the person was under another VP. It's extremely unprofessional.
The org chart will tell you the difference.
To be clear, the reason it's not OK is that a professional context should not also be a sexual context. It's not about protecting the person you're making out with. It's about everyone else. This is the same reason that excessive PDA in the workplace can be sexual harassment of other employees, even if both parties to the PDA are consenting.