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. 2021 Aug 20;15:722456. doi: 10.3389/fnbeh.2021.722456

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Copyright © 2021 Bogacki-Rychlik, Rolf and Bialy.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Total number of PVs with relation to the sum of ejaculations during sessions 2–4. Numbers on the X-axis represent the sum of ejaculation from 0 to 3 achieved by the male during all three sessions 2–4. 0- means that male did not achieve any ejaculation during three sessions, respectively, 1—only one ejaculation during three sessions, 2—two ejaculations, and 3—ejaculated in each session. Numbers on the Y-axis represent the sum of PVs emitted by the male during sessions 2–4. The diamond represents an individual male. r = 0.5608, P < 0.05.