because we're simple
this is a silly question. Mixed signals are a two-way street, I would just as quickly ask you; Why do women send mixed signals to men?
They think differently.
They don't. It's just that some straight men perceive flirty signals everywhere they look.
Yes they do send out signals
Axons send signals.
No, nerves do not send signals. They transmit signals produced by receptors or the brain or spinal cord.
Some guys do send signals. Others do not. It really depends on the guy.
Neurons send signals to other neurons, muscles, and glands in the human body.
send signals
Radio frequency signals.
neurotransmitters send signals from neuron to neuron
Broadcasting stations use television satellites to send their signals around the world.