There a gift lists in Update logs 0.39 build, or you can use this guide from Ben Dover here
Bernard:
- Fine Wine (Req: Only during evening visit)
Caleb:
- Flower Arrangement
- Harness, Collar, Leash (Req: Walk event done)
Dulrig:
- Lube (Req: Doing discount scene)
Everett:
- Big Black Dildo (Req: Talk about the package from Dulrig)
- Canine Shaped Dildo (Req: Talk about the package from Dulrig)
Feliar:
- Flower Arrangement
- Fruit Tea
- Exotic Coffee
Grushk:
- 'No-Horny' Potion Set
Gunnar:
- Flower Arrangement
Logan:
- Flower Arrangement
- Tank Top
Rose:
- Flower Arrangement
- Fruit Tea
- Exotic Coffee
Vicoria:
- 'No-Horny' Potion Set
- Big Black Dildo/Canine Shaped Dildo/Equine Shaped Dildo