The precept is defined in the suttas as "sexual bodily action":
And how is one made pure in three ways by bodily action?... Abandoning sensual misconduct, he abstains from sensual misconduct. He does not get sexually involved with those who are protected by
their mothers, their fathers, their brothers, their sisters, their
relatives, or their Dhamma; those with husbands, those who entail
punishments, or even those crowned with flowers by another man.
Since the suttas (DN 31) also teach parents must arrange the marriage of their children and also teach the taint of woman is sexual unchastity, the precept of sexual misconduct also includes sex outside of marriage, i.e. sex without commitment, without compassion, motivated only by lust.
As for sensual pleasures in general, there are many suttas, such as MN 75 and MN 54, which describe the negative aspect of sensual pleasures however these suttas do not appear to use the term "misconduct":
So too, Māgandiya, formerly when I lived the home life, I enjoyed myself, provided and endowed with the five cords of sensual pleasure:
with forms cognizable by the eye…with tangibles cognizable by the body
that are wished for, desired, agreeable, and likeable, connected with
sensual desire and provocative of lust. On a later occasion, having
understood as they actually are the gratification, the danger, and the
escape in the case of sensual pleasures, I abandoned craving for
sensual pleasures, I removed fever for sensual pleasures, and I abide
without thirst, with a mind inwardly at peace. I see other beings who
are not free from lust for sensual pleasures being devoured by craving
for sensual pleasures, burning with fever for sensual pleasures,
mn.i.506 indulging in sensual pleasures, and I do not envy them nor do
I delight therein. Why is that? Because there is, Māgandiya, a delight
apart from sensual pleasures, apart from unwholesome states, which
surpasses even divine bliss. Since I take delight in that, I do not
envy what is inferior, nor do I delight therein.
2“Suppose, Māgandiya, there was a leper with sores and blisters on his limbs, being devoured by worms, scratching the scabs off the
openings of his wounds with his nails, cauterising his body over a
burning charcoal pit. Then his friends and companions, his kinsmen and
relatives, would bring a physician to treat him. The physician would
make medicine for him, and by means of that medicine the man would be
cured of his leprosy and would become well and happy, independent,
master of himself, able to go where he likes. Then he might see
another leper with sores and blisters on his limbs, being devoured by
worms, scratching the scabs off the openings of his wounds with his
nails, cauterising his body over a burning charcoal pit. What do you
think, Māgandiya? Would that man envy that leper for his burning
charcoal pit or his use of medicine?”
“No, Master Gotama. Why is that? Because when there is sickness, there is need for medicine, and when there is no sickness there is no
need for medicine.”
“So too, Māgandiya, formerly when I lived the home life…as in §12…Since I take delight in that, I do not envy what is inferior, nor
do I delight therein.
Householder, there are these eight things in the Noble One’s Discipline that lead to the cutting off of affairs. What are the eight? With the support of the non-killing of living beings, the killing of living beings is to be abandoned. With the support of taking only what is given, the taking of what is not given is to be abandoned. With the support of truthful speech, false speech is to be abandoned. With the support of unmalicious speech, malicious speech is to be abandoned. With the support of no rapacity and greed, rapacity and greed are to be abandoned. With the support of no spite and scolding, spite and scolding are to be abandoned. With the support of no anger and irritation, anger and irritation are to be abandoned. With the support of non-arrogance, arrogance is to be abandoned. These are the eight things, stated in brief without being expounded in detail, that lead to the cutting off of affairs in the Noble One’s Discipline.