@Glennn,
pe·do·phil·i·a
/ˌpēdəˈfilēə,ˌpedəˈfilēə/
noun
sexual feelings directed toward children.
____________________________
I think the pedo rap isn't because anyone thinks Biden has a basement full of children he likes to have sex with - but his behavior on camera with children (and women) lends strongly to a perception that he does get some sort of sex-related satisfaction touching them, kissing their heads and hair, sniffing them, and otherwise invading their space in a sexual-type manner.
Pedophilia doesn't mean you have sex with children - it means you get a sexual turn on in some way through interaction with them or their images.