This world consists of only men, where some can get pregnant and while others do the impregnating. There are also fated mates.

Kemonomimi characters that go into heat, and males can also give birth.

Male character who gives birth, also becomes bonded to his mate.

Basically, the author took the basics of Omegaverse and re-wrote them for a Dom/sub world. The subs go into heat like omegas.

Werewolf goes into heat when the moon is full.

The uke's scent attracts males to him like flies to honey

Attraction by pheromones. 

Male character can go into heat and give birth.

The first two chapters hint HARD at it being an Omegaverse but never outright says it. We have:

• Caste society, based on your level of furry. the more human you are, the more poorly you're treated.
• A lower-caste character taking some form of pheromone inhibitor.
• Said lower-caste character accidentally setting off higher-caste characters with her funk.

Part-animal humans who go into heat.

Fated mates who know they are destined to be together by their scent when they first meet.

A young man has an alluring scent that, for some reason, attracts perverts.

A boy who can get pregnant attracts other boys with his pheromones. 

Might appeal to fans of 'Remnant' and 'Pendulum'.

Alluring scent

Uke is 'marked' by his sex partner and becomes bonded. Now he's sexually dependant on his mate, who as a result is now extremely attached to the scent he emits.