For a certain fee now any stranger is ready to take off her clothes, spread her legs and suck the first man she meets. Every cute girl is weak in the face when she sees bucks in front of her. I wouldn't want to be a pickup artist because it's a risky business to fuck unknown holes. Sure you can use a condom, but rubber doesn't always save the day.
When my sister is tied up, with her legs spread apart, even my brother would not refuse to take advantage of her pussy. She'll open her own mouth.