Romans 1:26

1:26 For this reason God gave them over to dishonorable passions. For their women exchanged the natural sexual relations for unnatural ones, 1 

Romans 13:13

13:13 Let us live decently as in the daytime, not in carousing and drunkenness, not in sexual immorality and sensuality, not in discord and jealousy.

1 tn Grk “for their females exchanged the natural function for that which is contrary to nature.” The term χρῆσις (crhsi") has the force of “sexual relations” here (L&N 23.65).