Why is my boar guinea pig osbessed with my feet and likes to nip my toes when he is out running and playing?

i lost my oldest guinea pig on sunday through a heart attack, he died in my arms and their was nothing that we could do because he went so fast! he had health problems as well but they was under control he had just reached 3 and half we think (?) as we rehomed him few years ago, he had a great life with us and i really miss him! i had 2 boar piggies, and my piggie that i have now is osbessed with my feet he loves to bite my toes? im not too sure why, because when my other piggie was alive he didn't bother at all! its only recently he has started to bite, its not sore tho!!! they didn't get on too well, but they never fought like you here that some boars do and they don't get on and they fight constantly!! does any one know why he is suddenly bitting me??