Determining the sex of a dog is relatively straightforward. Here are a few visual cues to help you determine if your dog is male:

1. Observe the External Genitalia: In male dogs, the external genitalia consists of a penis and scrotum. Lift the tail of your dog and gently examine the area located just above the anus. You should be able to see the penis, which will be protruding from a small sheath. Additionally, the scrotum, which contains the testicles, may be visible just below the penis.

2. Look for Nipple Presence: Male dogs can have small, undeveloped nipples on their abdomen, but they are typically less prominent than in female dogs. However, this is not a definitive way to determine the sex of a dog, as the presence or absence of nipples can vary among individuals.

3. Seek Professional Assistance: If you're unsure about your dog's gender or if the visual cues are not clear, it's always recommended to consult a veterinarian. They have the expertise to determine the sex of your dog accurately and can provide guidance based on a physical examination.

Remember, determining the sex of a dog is important for various reasons, including proper identification, healthcare, and spaying/neutering considerations. If you have any doubts or need to confirm your dog's gender, it's best to consult a veterinarian for accurate information.