Well, smoking causes male sexual impotence.

Smoking increases the risk of erectile dysfunction by around 50
percent for men in their 30s and 40s. Diabetes, high cholesterol levels
and drugs used to treat high blood pressure are also important risk
factors.

During an erection, large quantities of blood flows, under pressure,
into the penile arteries. This causes the veins which drain the penis
to become compressed, so preventing the immediate outflow of blood.
This process is significantly impaired by smoking.

1. Less blood flows into the penis if the inflow route is blocked by
long term build-up of fatty deposits in the arteries (atherosclerosis)
caused, in part, by smoking.

2. Rapid contractions in penile tissue, a direct an immediate result
of nicotine stimulation in the brain, restrict arterial blood flow into
the penis. This is known as acute vasospasm.

3. The valve mechanism that traps blood in the penis is impaired as
a result of nicotine in the blood stream. This is known as venous
dilation.

The damage caused by smoking to male sexual health also includes:

Reduced volume of ejaculate


Lowered sperm count


Abnormal sperm shape


Impaired sperm motility

So dont let your sex life go up in a smoke, if you know what I mean. Take care my friend and think about quitting smoking.