A bit of a NSFW warning i guess(?)...
It’s not a view that everyone has but I can’t imagine anything more arousing than creating a life with your lover. As a guy, imagine what it would be like to have your partner welcome you into her with the intention of making a child. I think it would be so nice to see her growing more and more round as the child(ren) you made together develop in her womb. Perhaps she’s even a bit more vulnerable and dependent on you for support due to this and so the two of you grow even closer. Eventually she bears your young and you, filled with excitement and pride, get to enjoy seeing those bundles of joy do their things. If you were a human girl, i would assume it could be enticing in the opposite way. You mate with your lover and get to experience the sensations of him forcing his way into you, desperate to impregnate you with his young. I would imagine he’d be a bit more protective of you once you were carrying as to make sure nothing happens to you. That emotional connection would be pretty sick I’d imagine. I also would imagine the physiological sensations caused by pregnancy hormones along with the simple feelings of your body changing and your children squirming and growing inside of you would be a thrill of its own on top of this. The actual delivery may be a bit rough, but it might be worth it in the end as you look upon your nursing young and your lover by your side.
Idk i find the concept of pregnancy beautiful and enticing, if it were a possibility for we humans to create young with animals, i would definitely want to take part... if the offspring were also animals. It might be fun if they had a “human-like” intelligence while still maintaining their natural forms, but if they were like a full human-animal hybrid that would be a bit of a nightmare in my opinion.