RESUMO
Identify the breastfeeding knowledge, the attitudes towards sexuality and breastfeeding and the disposition towards supporting breastfeeding in future fathers were the aims of this study. A non-probabilistic sample (n = 100) of future Puerto Rican male parents was used in this study. A self-administered questionnaire was used consisting of four sections. Descriptive statistics were used for data analysis and t-test to the inferential analysis. 88.8of the participants presented a low level of knowledge. However, 81.6had a positive attitude toward sexuality and breastfeeding. Also, 92.0of the participants indicated much/enough willingness to support their partners in exclusively breastfeeding. Disposition to support the breastfeeding was associated with knowledge towards breastfeeding (p = 0.04) and attitudes toward sexuality and breastfeeding (p = 0.00). The knowledge and the attitudes, in this study, are strongly related with the disposition of the father to supporting the breastfeeding in the future.