1. He is gay, and he wants to know if Paul and Jose are available for a sexy, all-male threesome.
2. He’s a kidnapper, a rapist, and/or a murderer, and he wants to know if you have a boyfriend who’ll protect you from him. (His buying rope, cable ties, and tape from Clayton’s would support this hypothesis.)
3. He doesn’t do ‘the girlfriend thing’, but wants to have copious casual sex with you and wants to make sure that you’re not in a monogamous relationship beforehand.
4. He doesn’t do ‘the girlfriend thing’ because he’s never trusted anyone, and asked all of those boyfriend questions because he wants to know what a relationship is like.
Ask about those things, Ana. Whether Christian lied in the interview is the least of your problems.