certain reasons; certain circumstances; professional constraints; (lit.) adult matters
meekly; obediently; submissively; quietly; like a lamb
(an) adult their age (should, should not, etc.); grown man (woman); person who is old enough (to know better)
(an) adult their age (should, should not, etc.); grown man (woman); person who is old enough (to know better)
grown man; grown woman; grown-up person; sensible person
certain reasons; certain circumstances; professional constraints; (lit.) adult matters
handling things like an adult; behaving like a mature grown-up
for use by adults; for adults
on the gentle side; somewhat meek; rather quiet
certain reasons; certain circumstances; professional constraints; (lit.) adult reasons
gentle; quiet; demure; sober; mild-mannered; meek
adult version; adult edition
adult toy shop (i.e. a sex shop)
(intended) for adults; aimed at adults
precocious; unchildlike; early-blooming
(intended) for adults; aimed at adults