Why women are licking penis to have sex, even though it is full of urine, viruses and toxic substances?

thats actually a good question. i guess women do it because they enjoy it, or want to please the man

What "toxic substances"? You sound like a virgin.

Women Licking Penis

Urine lives in a man's bladder, not in his penis.

If your penis have a virus, you got infected and have an infection that should be treated.

There are no toxins in the human body.