A) When you think it's perfectly okay to perform such sexual acts as licking nipples and/or "going down
" on prostitutes, as you would only when making love with your significant other
B) When a 'John' goes beyond just having sex with a prostitute and often tries kissing and caressing her intimate areas
, making the situation intensely awkward, he is then known as a 'Dave'.
"This 'John' pulled a Dave Hunter
and started licking my nipples. He totally thought it was cool."
"All the girls know that guy can be a real 'Dave', so we don't try to pick him up."