Is that weird? Or am I weird for thinking that it's weird?

Would you ever recommend yaoi manga to a friend/sister who's like 3 years younger than you? Let's say that you're 17/18 and your friend is 14. Is that normal? I'm not talking about yaoi manga that's obviously porn. I'm talking about normal yaoi manga that has a good plot and interesting characters (like Life Senjou no Bokura, Blue Lust and Sojou No Koi Wa Nido Haneru). I've just recently joined a new friend group and one of the girls (she's 18 years old) says that she discusses yaoi with her 14 year old sister. Is that too weird?