Whether Baird had standing to assert the constitutional rights of unmarried persons denied access to contraceptives.
Holding
Yes. Baird could challenge the statute's discriminatory denial of contraceptives to unmarried persons.
Reasoning
Baird plainly had an Article III injury because he had been convicted under the statute. The State nevertheless argued that he could challenge only the restriction on who may distribute contraceptives, not the separate restriction on who may receive them. The Court rejected that effort to isolate the distributor restriction because, if the law was not genuinely a health regulation, Baird's conviction rested on a statutory scheme that discriminatorily burdened potential recipients.
The Court also relaxed the usual rule against asserting third-party rights. Baird deliberately distributed the foam to challenge the law, making his relationship to prospective contraceptive users one of advocacy rather than a merely accidental vendor-customer connection.
Most importantly, unmarried persons had no effective practical forum of their own: Massachusetts prohibited distribution, not possession or use, so recipients were not themselves subject to prosecution. Enforcement against distributors would directly impair unmarried persons' ability to obtain contraceptives. Baird therefore had both a strong incentive and an appropriate position to press their rights.