Hello and thanks for researching this important question!
Breeders who need to collect semen for artificial insemination can use a product humerously called "Eau d'Estrus". Most intact males that are mature enough to breed do not need it! You can contact the company that produces this brand name here:
You can find how to use it, along with other helpful breeding info, here:
This link contains photos taken during a collection that you may find helpful:
If you need additional support at this time, please click "Reply", otherwise I thank You in advance for your "Accept", and wish you a successful breeding!