jumping into lap

Hi All, Since Larry has been with us she's got more and more comfortable, to the point now where she completely trusts us (we got her at 8 week old, she'll be about 17 week old now). She is definitely the most unique and loving pig we have and seems to be a complete daredevil, Larry loves...

so when I have our my 4 month old girl in her play pen area and I’m in there with her the will jump into my lap every couple minutes, lick my hand, then go play and keep doing this. I didn’t think guinea pigs were so affectionate prior to owning them. But then I wondered...do they really form...