Guinea pigs show affection towards their owners in various ways. Some common signs of affection from guinea pigs include gentle nuzzling, purring or cooing sounds, licking or nibbling their owner's fingers, and being particularly social and playful when around their owners. Additionally, guinea pigs may also show their affection by seeking physical contact, such as snuggling against their owner's hand or lap. It's important to spend quality time with your guinea pig to develop a strong bond and mutual trust.