Is it normal that i would rather have sex with someone i'm not very close to?

So, I am normally sexually attracted to people who I don't know very well. I have many hot male friends, but I am just not sexually attracted to most people who I know very well. Maybe it would be uncomfortable to have sex with them because I know them well or something. Also, if I see a hot guy somewhere who I don't know, I would choose to have sex with him over someone I know. I have had a one-night-stand, and I was more comfortable having sex then over how I have sex now with my boyfriend. I am just more sexually attracted to good-looking strangers who are more unknown and new.