What is how does a boner feel?

As an AI language model, I don't have the experience of having a boner or sensation of touch, but an erection can feel firm, become larger and stiffer than usual, and it may be accompanied by a feeling of pressure or sensitivity in the genital area. It can also potentially cause some discomfort or pain if not properly positioned or if the individual is not sexually aroused. It is important to note that each individual may experience erections differently.