This comparative study of COVID-19 lockdown aims to underline changes in gender role behaviors of South-Asian men (husbands) living in different gender regimes: Pakistan and Germany. As a nascent contribution to existing discourses of political science (gender regimes), international migration, and men and masculinity, the study compares self-reported changes in husbands' masculine and feminine role behaviors with perceptions of their wives during the lockdown period. A gender role behavior scale is adapted to design an online survey and collect data through convenient and snowball sampling techniques. By computing analysis of variance (ANOVA) with repeated measures, the study infers that the COVID-19 driven first lockdown has limited the mobility of men (husbands). Thus, they have reported a significant decline in their traditional masculine role behaviors (outside the home) in both countries.Nonetheless, a subsequent increase does not appear in their feminine role behaviors.Although temporary suspension of their breadwinning roles due to lockdown has allowed them to modify their gender role behaviors by sharing increased domestic and caregiving tasks in families, a significant change does not appear in their behaviors. Findings conclude that social upheaval (COVID-19) does not convince men (husbands) to interchange their masculine and feminine role behaviors in families. Thus, inferences support key prims of bio-socialists that gender role behaviors are inherited and may change through cultural advancements (through gender education and enabling legal frameworks) in relatively less gender-egalitarian societies and proper 'gendered integration' initiatives in relatively more gender-egalitarian societies.