Earlier quoted context omitted.
Demo Day is a business context. If you are an investor talking to the founder of a YC startup, it's a business conversation. There shouldn't be any hint of romance, dates, flirting. Explicit enough for you?
Then say all and not inappropriate - presumably you come down with a fit of vapours when NCIS is on and Toy and Ziva flirt.
For contrast, look at Gibbs and Abby, who do have a supervisor-supervised relationship with the same power dynamics as that between investors and entrepreneurs. In their case, the show goes out of its way to make sure everyone understands that their relationship, while affectionate, is neither romantic nor sexual.
Why? Because it would be super creepy if Gibbs, who is both Abby's boss and much older than her, suddenly made a pass at her out of nowhere.